/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-invgen/string_concat-noarr.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 20:58:43,674 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 20:58:43,676 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 20:58:43,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 20:58:43,738 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 20:58:43,741 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 20:58:43,743 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 20:58:43,745 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 20:58:43,746 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 20:58:43,749 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 20:58:43,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 20:58:43,750 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 20:58:43,751 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 20:58:43,752 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 20:58:43,753 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 20:58:43,755 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 20:58:43,755 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 20:58:43,756 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 20:58:43,757 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 20:58:43,761 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 20:58:43,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 20:58:43,762 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 20:58:43,763 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 20:58:43,764 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 20:58:43,768 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 20:58:43,768 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 20:58:43,768 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 20:58:43,769 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 20:58:43,769 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 20:58:43,770 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 20:58:43,770 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 20:58:43,770 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 20:58:43,772 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 20:58:43,772 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 20:58:43,773 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 20:58:43,773 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 20:58:43,773 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 20:58:43,774 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 20:58:43,774 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 20:58:43,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 20:58:43,774 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 20:58:43,775 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 20:58:43,784 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 20:58:43,784 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 20:58:43,785 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 20:58:43,785 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 20:58:43,785 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 20:58:43,785 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 20:58:43,785 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 20:58:43,786 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 20:58:43,786 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 20:58:43,786 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 20:58:43,786 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 20:58:43,786 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 20:58:43,786 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 20:58:43,787 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 20:58:43,787 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 20:58:43,787 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 20:58:43,787 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 20:58:43,787 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 20:58:43,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 20:58:43,787 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 20:58:43,787 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 20:58:43,787 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 20:58:43,787 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 20:58:43,787 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 20:58:43,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 20:58:43,959 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 20:58:43,961 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 20:58:43,961 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 20:58:43,968 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 20:58:43,968 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/string_concat-noarr.i [2022-01-31 20:58:44,002 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9c22fab2/a86b7668a49f4f8697d462129560bfa4/FLAGabf883871 [2022-01-31 20:58:44,356 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 20:58:44,356 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/string_concat-noarr.i [2022-01-31 20:58:44,364 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9c22fab2/a86b7668a49f4f8697d462129560bfa4/FLAGabf883871 [2022-01-31 20:58:44,373 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9c22fab2/a86b7668a49f4f8697d462129560bfa4 [2022-01-31 20:58:44,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 20:58:44,376 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 20:58:44,377 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 20:58:44,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 20:58:44,379 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 20:58:44,380 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:58:44" (1/1) ... [2022-01-31 20:58:44,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@268ec5fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:58:44, skipping insertion in model container [2022-01-31 20:58:44,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:58:44" (1/1) ... [2022-01-31 20:58:44,384 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 20:58:44,392 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 20:58:44,513 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/string_concat-noarr.i[893,906] [2022-01-31 20:58:44,521 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 20:58:44,526 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 20:58:44,534 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/string_concat-noarr.i[893,906] [2022-01-31 20:58:44,535 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 20:58:44,542 INFO L208 MainTranslator]: Completed translation [2022-01-31 20:58:44,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:58:44 WrapperNode [2022-01-31 20:58:44,543 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 20:58:44,543 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 20:58:44,543 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 20:58:44,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 20:58:44,549 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:58:44" (1/1) ... [2022-01-31 20:58:44,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:58:44" (1/1) ... [2022-01-31 20:58:44,553 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:58:44" (1/1) ... [2022-01-31 20:58:44,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:58:44" (1/1) ... [2022-01-31 20:58:44,559 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:58:44" (1/1) ... [2022-01-31 20:58:44,562 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:58:44" (1/1) ... [2022-01-31 20:58:44,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:58:44" (1/1) ... [2022-01-31 20:58:44,563 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 20:58:44,564 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 20:58:44,564 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 20:58:44,564 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 20:58:44,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:58:44" (1/1) ... [2022-01-31 20:58:44,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 20:58:44,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 20:58:44,586 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 20:58:44,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 20:58:44,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 20:58:44,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 20:58:44,637 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 20:58:44,637 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 20:58:44,638 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 20:58:44,638 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 20:58:44,638 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 20:58:44,638 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 20:58:44,639 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 20:58:44,639 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 20:58:44,639 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 20:58:44,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 20:58:44,639 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 20:58:44,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 20:58:44,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 20:58:44,641 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 20:58:44,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 20:58:44,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 20:58:44,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 20:58:44,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 20:58:44,642 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 20:58:44,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 20:58:44,712 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 20:58:44,713 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 20:58:44,803 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 20:58:44,808 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 20:58:44,808 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 20:58:44,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:58:44 BoogieIcfgContainer [2022-01-31 20:58:44,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 20:58:44,811 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 20:58:44,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 20:58:44,820 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 20:58:44,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:58:44" (1/3) ... [2022-01-31 20:58:44,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@533ce85a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:58:44, skipping insertion in model container [2022-01-31 20:58:44,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:58:44" (2/3) ... [2022-01-31 20:58:44,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@533ce85a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:58:44, skipping insertion in model container [2022-01-31 20:58:44,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:58:44" (3/3) ... [2022-01-31 20:58:44,823 INFO L111 eAbstractionObserver]: Analyzing ICFG string_concat-noarr.i [2022-01-31 20:58:44,826 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 20:58:44,826 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 20:58:44,858 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 20:58:44,863 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-01-31 20:58:44,863 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 20:58:44,873 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:58:44,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 20:58:44,878 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:58:44,878 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:58:44,879 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:58:44,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:58:44,883 INFO L85 PathProgramCache]: Analyzing trace with hash -623416428, now seen corresponding path program 1 times [2022-01-31 20:58:44,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:58:44,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11745535] [2022-01-31 20:58:44,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:58:44,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:58:44,931 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:58:44,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:44,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:58:45,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:45,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:58:45,009 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:58:45,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11745535] [2022-01-31 20:58:45,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [11745535] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:58:45,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:58:45,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 20:58:45,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633891836] [2022-01-31 20:58:45,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:58:45,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 20:58:45,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:58:45,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 20:58:45,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 20:58:45,038 INFO L87 Difference]: Start difference. First operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:45,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:58:45,075 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2022-01-31 20:58:45,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 20:58:45,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 20:58:45,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:58:45,081 INFO L225 Difference]: With dead ends: 43 [2022-01-31 20:58:45,081 INFO L226 Difference]: Without dead ends: 18 [2022-01-31 20:58:45,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 20:58:45,086 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:58:45,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:58:45,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-31 20:58:45,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-01-31 20:58:45,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:45,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-01-31 20:58:45,110 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2022-01-31 20:58:45,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:58:45,110 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-01-31 20:58:45,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:45,111 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-01-31 20:58:45,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 20:58:45,111 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:58:45,111 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:58:45,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 20:58:45,112 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:58:45,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:58:45,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1308012743, now seen corresponding path program 1 times [2022-01-31 20:58:45,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:58:45,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303673640] [2022-01-31 20:58:45,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:58:45,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:58:45,115 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:58:45,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:45,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:58:45,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:45,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:58:45,197 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:58:45,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303673640] [2022-01-31 20:58:45,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1303673640] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:58:45,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:58:45,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 20:58:45,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295686124] [2022-01-31 20:58:45,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:58:45,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 20:58:45,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:58:45,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 20:58:45,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 20:58:45,199 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:45,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:58:45,299 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2022-01-31 20:58:45,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 20:58:45,300 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-01-31 20:58:45,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:58:45,301 INFO L225 Difference]: With dead ends: 29 [2022-01-31 20:58:45,301 INFO L226 Difference]: Without dead ends: 23 [2022-01-31 20:58:45,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:58:45,306 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:58:45,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 30 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:58:45,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-31 20:58:45,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2022-01-31 20:58:45,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:45,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-01-31 20:58:45,321 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2022-01-31 20:58:45,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:58:45,322 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-01-31 20:58:45,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:45,323 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-01-31 20:58:45,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 20:58:45,324 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:58:45,325 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:58:45,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 20:58:45,325 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:58:45,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:58:45,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1066675892, now seen corresponding path program 1 times [2022-01-31 20:58:45,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:58:45,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521926507] [2022-01-31 20:58:45,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:58:45,480 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:58:45,480 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:58:45,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:58:45,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:45,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:58:45,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:45,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:58:45,700 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:58:45,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521926507] [2022-01-31 20:58:45,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1521926507] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:58:45,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:58:45,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 20:58:45,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325656029] [2022-01-31 20:58:45,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:58:45,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 20:58:45,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:58:45,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 20:58:45,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-31 20:58:45,704 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:45,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:58:45,997 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2022-01-31 20:58:45,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 20:58:45,998 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-31 20:58:45,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:58:45,998 INFO L225 Difference]: With dead ends: 39 [2022-01-31 20:58:45,998 INFO L226 Difference]: Without dead ends: 25 [2022-01-31 20:58:45,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-01-31 20:58:46,000 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 53 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:58:46,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 35 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:58:46,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-31 20:58:46,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-01-31 20:58:46,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:46,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-01-31 20:58:46,004 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2022-01-31 20:58:46,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:58:46,004 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-01-31 20:58:46,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:46,004 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-01-31 20:58:46,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 20:58:46,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:58:46,005 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:58:46,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 20:58:46,005 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:58:46,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:58:46,005 INFO L85 PathProgramCache]: Analyzing trace with hash 772441593, now seen corresponding path program 1 times [2022-01-31 20:58:46,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:58:46,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048440189] [2022-01-31 20:58:46,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:58:46,088 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:58:46,088 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:58:46,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:58:46,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:46,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:58:46,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:46,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:58:46,158 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:58:46,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048440189] [2022-01-31 20:58:46,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1048440189] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:58:46,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:58:46,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 20:58:46,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5220065] [2022-01-31 20:58:46,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:58:46,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 20:58:46,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:58:46,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 20:58:46,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:58:46,159 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:46,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:58:46,268 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2022-01-31 20:58:46,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 20:58:46,269 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-01-31 20:58:46,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:58:46,269 INFO L225 Difference]: With dead ends: 33 [2022-01-31 20:58:46,269 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 20:58:46,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-01-31 20:58:46,270 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:58:46,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 40 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:58:46,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 20:58:46,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2022-01-31 20:58:46,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:46,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-01-31 20:58:46,275 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2022-01-31 20:58:46,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:58:46,275 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-01-31 20:58:46,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:46,275 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-01-31 20:58:46,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 20:58:46,275 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:58:46,276 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:58:46,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 20:58:46,276 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:58:46,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:58:46,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1071467148, now seen corresponding path program 2 times [2022-01-31 20:58:46,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:58:46,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683209851] [2022-01-31 20:58:46,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:58:46,359 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:58:46,359 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:58:46,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:58:46,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:46,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:58:46,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:46,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:58:46,438 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:58:46,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683209851] [2022-01-31 20:58:46,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1683209851] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:58:46,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:58:46,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 20:58:46,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019343158] [2022-01-31 20:58:46,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:58:46,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 20:58:46,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:58:46,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 20:58:46,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-31 20:58:46,440 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:46,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:58:46,599 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-01-31 20:58:46,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 20:58:46,600 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-01-31 20:58:46,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:58:46,601 INFO L225 Difference]: With dead ends: 38 [2022-01-31 20:58:46,601 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 20:58:46,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-01-31 20:58:46,602 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:58:46,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 40 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:58:46,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 20:58:46,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2022-01-31 20:58:46,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:46,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-01-31 20:58:46,606 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2022-01-31 20:58:46,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:58:46,606 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-01-31 20:58:46,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:46,606 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-01-31 20:58:46,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 20:58:46,607 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:58:46,607 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:58:46,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 20:58:46,607 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:58:46,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:58:46,608 INFO L85 PathProgramCache]: Analyzing trace with hash 753725999, now seen corresponding path program 3 times [2022-01-31 20:58:46,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:58:46,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675775799] [2022-01-31 20:58:46,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:58:46,666 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:58:46,666 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:58:46,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:58:46,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:46,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:58:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:58:46,780 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:58:46,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675775799] [2022-01-31 20:58:46,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [675775799] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:58:46,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:58:46,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 20:58:46,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942507639] [2022-01-31 20:58:46,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:58:46,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 20:58:46,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:58:46,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 20:58:46,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:58:46,781 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:46,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:58:46,955 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2022-01-31 20:58:46,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 20:58:46,956 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-01-31 20:58:46,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:58:46,957 INFO L225 Difference]: With dead ends: 43 [2022-01-31 20:58:46,957 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 20:58:46,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2022-01-31 20:58:46,958 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 46 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:58:46,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 40 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:58:46,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 20:58:46,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2022-01-31 20:58:46,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:46,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2022-01-31 20:58:46,963 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2022-01-31 20:58:46,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:58:46,963 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2022-01-31 20:58:46,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:46,963 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2022-01-31 20:58:46,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 20:58:46,964 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:58:46,964 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:58:46,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 20:58:46,964 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:58:46,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:58:46,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1877283798, now seen corresponding path program 4 times [2022-01-31 20:58:46,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:58:46,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283077849] [2022-01-31 20:58:46,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:58:47,023 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:58:47,023 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:58:47,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:58:47,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:47,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:58:47,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:47,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:58:47,102 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:58:47,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283077849] [2022-01-31 20:58:47,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [283077849] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:58:47,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:58:47,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 20:58:47,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544139812] [2022-01-31 20:58:47,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:58:47,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 20:58:47,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:58:47,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 20:58:47,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-01-31 20:58:47,104 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:47,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:58:47,311 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2022-01-31 20:58:47,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 20:58:47,311 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-01-31 20:58:47,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:58:47,312 INFO L225 Difference]: With dead ends: 48 [2022-01-31 20:58:47,312 INFO L226 Difference]: Without dead ends: 42 [2022-01-31 20:58:47,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2022-01-31 20:58:47,313 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 64 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:58:47,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 35 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:58:47,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-31 20:58:47,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2022-01-31 20:58:47,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:47,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-01-31 20:58:47,317 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2022-01-31 20:58:47,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:58:47,318 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-01-31 20:58:47,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:47,318 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-01-31 20:58:47,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 20:58:47,318 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:58:47,318 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:58:47,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 20:58:47,319 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:58:47,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:58:47,319 INFO L85 PathProgramCache]: Analyzing trace with hash -541961371, now seen corresponding path program 5 times [2022-01-31 20:58:47,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:58:47,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052906384] [2022-01-31 20:58:47,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:58:47,374 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:58:47,374 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:58:47,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:58:47,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:47,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:58:47,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:47,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:58:47,461 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:58:47,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052906384] [2022-01-31 20:58:47,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1052906384] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:58:47,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:58:47,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 20:58:47,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214249580] [2022-01-31 20:58:47,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:58:47,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 20:58:47,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:58:47,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 20:58:47,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:58:47,463 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:47,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:58:47,695 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2022-01-31 20:58:47,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 20:58:47,696 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-01-31 20:58:47,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:58:47,696 INFO L225 Difference]: With dead ends: 53 [2022-01-31 20:58:47,696 INFO L226 Difference]: Without dead ends: 47 [2022-01-31 20:58:47,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2022-01-31 20:58:47,697 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 59 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:58:47,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 40 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:58:47,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-31 20:58:47,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2022-01-31 20:58:47,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:47,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2022-01-31 20:58:47,702 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2022-01-31 20:58:47,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:58:47,702 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2022-01-31 20:58:47,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:47,702 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2022-01-31 20:58:47,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 20:58:47,703 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:58:47,703 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:58:47,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 20:58:47,703 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:58:47,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:58:47,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1492330528, now seen corresponding path program 6 times [2022-01-31 20:58:47,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:58:47,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100255095] [2022-01-31 20:58:47,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:58:47,778 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:58:47,779 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:58:47,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:58:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:47,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:58:47,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:47,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:58:47,877 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:58:47,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100255095] [2022-01-31 20:58:47,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2100255095] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:58:47,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:58:47,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 20:58:47,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312141295] [2022-01-31 20:58:47,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:58:47,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 20:58:47,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:58:47,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 20:58:47,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-01-31 20:58:47,879 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:48,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:58:48,127 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2022-01-31 20:58:48,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 20:58:48,127 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-01-31 20:58:48,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:58:48,128 INFO L225 Difference]: With dead ends: 58 [2022-01-31 20:58:48,128 INFO L226 Difference]: Without dead ends: 52 [2022-01-31 20:58:48,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=283, Invalid=709, Unknown=0, NotChecked=0, Total=992 [2022-01-31 20:58:48,129 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 77 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:58:48,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 35 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:58:48,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-31 20:58:48,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 34. [2022-01-31 20:58:48,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:48,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-01-31 20:58:48,134 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2022-01-31 20:58:48,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:58:48,134 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-01-31 20:58:48,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:48,134 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-01-31 20:58:48,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 20:58:48,135 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:58:48,135 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:58:48,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 20:58:48,135 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:58:48,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:58:48,135 INFO L85 PathProgramCache]: Analyzing trace with hash 30943643, now seen corresponding path program 7 times [2022-01-31 20:58:48,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:58:48,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295457081] [2022-01-31 20:58:48,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:58:48,209 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:58:48,209 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:58:48,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:58:48,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:48,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:58:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:48,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:58:48,320 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:58:48,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295457081] [2022-01-31 20:58:48,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [295457081] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:58:48,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:58:48,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 20:58:48,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292799554] [2022-01-31 20:58:48,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:58:48,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 20:58:48,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:58:48,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 20:58:48,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:58:48,321 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:48,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:58:48,606 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2022-01-31 20:58:48,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 20:58:48,607 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-01-31 20:58:48,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:58:48,608 INFO L225 Difference]: With dead ends: 63 [2022-01-31 20:58:48,608 INFO L226 Difference]: Without dead ends: 57 [2022-01-31 20:58:48,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=343, Invalid=847, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 20:58:48,609 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 72 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:58:48,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 55 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:58:48,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-31 20:58:48,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2022-01-31 20:58:48,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:48,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-01-31 20:58:48,613 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2022-01-31 20:58:48,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:58:48,613 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-01-31 20:58:48,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:48,614 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-01-31 20:58:48,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 20:58:48,614 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:58:48,614 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:58:48,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 20:58:48,615 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:58:48,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:58:48,615 INFO L85 PathProgramCache]: Analyzing trace with hash -686425962, now seen corresponding path program 8 times [2022-01-31 20:58:48,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:58:48,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654051485] [2022-01-31 20:58:48,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:58:48,716 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:58:48,717 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:58:48,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:58:48,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:48,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:58:48,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:48,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:58:48,862 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:58:48,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654051485] [2022-01-31 20:58:48,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1654051485] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:58:48,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:58:48,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 20:58:48,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949639001] [2022-01-31 20:58:48,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:58:48,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 20:58:48,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:58:48,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 20:58:48,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-01-31 20:58:48,863 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 14 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:49,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:58:49,177 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2022-01-31 20:58:49,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 20:58:49,177 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 14 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-01-31 20:58:49,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:58:49,178 INFO L225 Difference]: With dead ends: 68 [2022-01-31 20:58:49,178 INFO L226 Difference]: Without dead ends: 62 [2022-01-31 20:58:49,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=409, Invalid=997, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 20:58:49,180 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 83 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:58:49,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 45 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:58:49,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-31 20:58:49,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 38. [2022-01-31 20:58:49,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:49,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2022-01-31 20:58:49,185 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2022-01-31 20:58:49,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:58:49,185 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2022-01-31 20:58:49,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 14 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:49,185 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2022-01-31 20:58:49,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 20:58:49,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:58:49,185 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:58:49,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 20:58:49,186 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:58:49,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:58:49,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1411118289, now seen corresponding path program 9 times [2022-01-31 20:58:49,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:58:49,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360639076] [2022-01-31 20:58:49,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:58:49,236 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:58:49,236 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:58:49,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:58:49,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:49,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:58:49,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:49,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:58:49,359 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:58:49,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360639076] [2022-01-31 20:58:49,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1360639076] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:58:49,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:58:49,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 20:58:49,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631073934] [2022-01-31 20:58:49,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:58:49,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 20:58:49,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:58:49,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 20:58:49,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-01-31 20:58:49,360 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:49,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:58:49,713 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2022-01-31 20:58:49,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 20:58:49,714 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-01-31 20:58:49,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:58:49,714 INFO L225 Difference]: With dead ends: 73 [2022-01-31 20:58:49,714 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 20:58:49,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=481, Invalid=1159, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 20:58:49,715 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 96 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:58:49,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 45 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:58:49,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 20:58:49,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 40. [2022-01-31 20:58:49,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:49,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-01-31 20:58:49,720 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2022-01-31 20:58:49,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:58:49,720 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-01-31 20:58:49,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:49,720 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-01-31 20:58:49,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 20:58:49,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:58:49,721 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:58:49,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 20:58:49,721 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:58:49,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:58:49,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1483485620, now seen corresponding path program 10 times [2022-01-31 20:58:49,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:58:49,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48464730] [2022-01-31 20:58:49,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:58:49,802 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:58:49,802 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:58:49,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:58:49,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:49,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:58:49,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:49,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:58:49,958 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:58:49,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48464730] [2022-01-31 20:58:49,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [48464730] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:58:49,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:58:49,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 20:58:49,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257954763] [2022-01-31 20:58:49,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:58:49,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 20:58:49,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:58:49,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 20:58:49,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-01-31 20:58:49,960 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:50,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:58:50,367 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2022-01-31 20:58:50,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 20:58:50,368 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-01-31 20:58:50,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:58:50,368 INFO L225 Difference]: With dead ends: 78 [2022-01-31 20:58:50,369 INFO L226 Difference]: Without dead ends: 72 [2022-01-31 20:58:50,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 20:58:50,370 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 115 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:58:50,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 40 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:58:50,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-31 20:58:50,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 42. [2022-01-31 20:58:50,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:50,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2022-01-31 20:58:50,375 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2022-01-31 20:58:50,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:58:50,375 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2022-01-31 20:58:50,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:50,375 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2022-01-31 20:58:50,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 20:58:50,375 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:58:50,375 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:58:50,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 20:58:50,376 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:58:50,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:58:50,376 INFO L85 PathProgramCache]: Analyzing trace with hash -59034361, now seen corresponding path program 11 times [2022-01-31 20:58:50,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:58:50,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150966525] [2022-01-31 20:58:50,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:58:50,430 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:58:50,431 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:58:50,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:58:50,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:50,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:58:50,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:50,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:58:50,589 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:58:50,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150966525] [2022-01-31 20:58:50,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1150966525] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:58:50,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:58:50,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 20:58:50,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601250192] [2022-01-31 20:58:50,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:58:50,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 20:58:50,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:58:50,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 20:58:50,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2022-01-31 20:58:50,590 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:51,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:58:51,052 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2022-01-31 20:58:51,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 20:58:51,052 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-01-31 20:58:51,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:58:51,053 INFO L225 Difference]: With dead ends: 83 [2022-01-31 20:58:51,053 INFO L226 Difference]: Without dead ends: 77 [2022-01-31 20:58:51,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=643, Invalid=1519, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 20:58:51,054 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 107 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:58:51,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 40 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:58:51,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-31 20:58:51,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 44. [2022-01-31 20:58:51,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:51,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2022-01-31 20:58:51,059 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 41 [2022-01-31 20:58:51,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:58:51,059 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2022-01-31 20:58:51,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:51,060 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2022-01-31 20:58:51,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 20:58:51,060 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:58:51,060 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:58:51,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 20:58:51,060 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:58:51,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:58:51,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1255941886, now seen corresponding path program 12 times [2022-01-31 20:58:51,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:58:51,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75766463] [2022-01-31 20:58:51,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:58:51,131 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:58:51,131 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:58:51,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:58:51,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:51,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:58:51,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:58:51,350 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:58:51,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75766463] [2022-01-31 20:58:51,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [75766463] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:58:51,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:58:51,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 20:58:51,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156990357] [2022-01-31 20:58:51,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:58:51,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 20:58:51,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:58:51,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 20:58:51,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2022-01-31 20:58:51,352 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:51,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:58:51,794 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2022-01-31 20:58:51,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 20:58:51,795 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-01-31 20:58:51,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:58:51,795 INFO L225 Difference]: With dead ends: 88 [2022-01-31 20:58:51,795 INFO L226 Difference]: Without dead ends: 82 [2022-01-31 20:58:51,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=733, Invalid=1717, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 20:58:51,796 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 102 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:58:51,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 50 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:58:51,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-01-31 20:58:51,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 46. [2022-01-31 20:58:51,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:51,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2022-01-31 20:58:51,801 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43 [2022-01-31 20:58:51,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:58:51,802 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2022-01-31 20:58:51,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:51,802 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2022-01-31 20:58:51,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 20:58:51,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:58:51,802 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:58:51,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 20:58:51,802 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:58:51,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:58:51,803 INFO L85 PathProgramCache]: Analyzing trace with hash -432838083, now seen corresponding path program 13 times [2022-01-31 20:58:51,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:58:51,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487659629] [2022-01-31 20:58:51,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:58:51,855 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:58:51,856 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:58:51,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:58:51,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:51,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:58:51,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:51,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:58:52,027 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:58:52,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487659629] [2022-01-31 20:58:52,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [487659629] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:58:52,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:58:52,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 20:58:52,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071322101] [2022-01-31 20:58:52,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:58:52,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 20:58:52,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:58:52,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 20:58:52,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2022-01-31 20:58:52,028 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 19 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:52,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:58:52,512 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2022-01-31 20:58:52,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 20:58:52,516 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 19 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-01-31 20:58:52,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:58:52,516 INFO L225 Difference]: With dead ends: 93 [2022-01-31 20:58:52,516 INFO L226 Difference]: Without dead ends: 87 [2022-01-31 20:58:52,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=829, Invalid=1927, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 20:58:52,517 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 137 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:58:52,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 35 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:58:52,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-31 20:58:52,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 48. [2022-01-31 20:58:52,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:52,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2022-01-31 20:58:52,532 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2022-01-31 20:58:52,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:58:52,532 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2022-01-31 20:58:52,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 19 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:52,532 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2022-01-31 20:58:52,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 20:58:52,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:58:52,535 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:58:52,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 20:58:52,535 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:58:52,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:58:52,535 INFO L85 PathProgramCache]: Analyzing trace with hash 295934136, now seen corresponding path program 14 times [2022-01-31 20:58:52,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:58:52,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167264620] [2022-01-31 20:58:52,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:58:52,613 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:58:52,614 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:58:52,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:58:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:52,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:58:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:52,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:58:52,822 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:58:52,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167264620] [2022-01-31 20:58:52,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1167264620] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:58:52,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:58:52,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 20:58:52,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750694750] [2022-01-31 20:58:52,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:58:52,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 20:58:52,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:58:52,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 20:58:52,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2022-01-31 20:58:52,824 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:53,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:58:53,289 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2022-01-31 20:58:53,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 20:58:53,296 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-01-31 20:58:53,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:58:53,297 INFO L225 Difference]: With dead ends: 98 [2022-01-31 20:58:53,297 INFO L226 Difference]: Without dead ends: 92 [2022-01-31 20:58:53,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=931, Invalid=2149, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 20:58:53,298 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 115 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:58:53,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 60 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:58:53,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-31 20:58:53,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 50. [2022-01-31 20:58:53,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:53,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2022-01-31 20:58:53,304 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2022-01-31 20:58:53,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:58:53,304 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2022-01-31 20:58:53,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:53,304 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2022-01-31 20:58:53,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 20:58:53,304 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:58:53,304 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:58:53,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 20:58:53,305 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:58:53,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:58:53,305 INFO L85 PathProgramCache]: Analyzing trace with hash 566367347, now seen corresponding path program 15 times [2022-01-31 20:58:53,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:58:53,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944784900] [2022-01-31 20:58:53,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:58:53,367 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:58:53,367 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:58:53,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:58:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:53,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:58:53,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:53,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:58:53,548 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:58:53,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944784900] [2022-01-31 20:58:53,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1944784900] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:58:53,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:58:53,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 20:58:53,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625783757] [2022-01-31 20:58:53,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:58:53,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 20:58:53,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:58:53,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 20:58:53,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2022-01-31 20:58:53,549 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:54,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:58:54,048 INFO L93 Difference]: Finished difference Result 103 states and 119 transitions. [2022-01-31 20:58:54,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 20:58:54,049 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-01-31 20:58:54,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:58:54,049 INFO L225 Difference]: With dead ends: 103 [2022-01-31 20:58:54,049 INFO L226 Difference]: Without dead ends: 97 [2022-01-31 20:58:54,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1039, Invalid=2383, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 20:58:54,051 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 144 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:58:54,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 45 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:58:54,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-31 20:58:54,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 52. [2022-01-31 20:58:54,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:54,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2022-01-31 20:58:54,056 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2022-01-31 20:58:54,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:58:54,056 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2022-01-31 20:58:54,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:54,056 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2022-01-31 20:58:54,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 20:58:54,057 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:58:54,057 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:58:54,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 20:58:54,057 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:58:54,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:58:54,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1540321938, now seen corresponding path program 16 times [2022-01-31 20:58:54,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:58:54,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625718874] [2022-01-31 20:58:54,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:58:54,112 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:58:54,112 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:58:54,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:58:54,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:54,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:58:54,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:54,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:58:54,329 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:58:54,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625718874] [2022-01-31 20:58:54,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1625718874] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:58:54,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:58:54,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 20:58:54,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581376109] [2022-01-31 20:58:54,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:58:54,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 20:58:54,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:58:54,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 20:58:54,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2022-01-31 20:58:54,330 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 22 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:54,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:58:54,898 INFO L93 Difference]: Finished difference Result 108 states and 125 transitions. [2022-01-31 20:58:54,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 20:58:54,898 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 22 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-01-31 20:58:54,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:58:54,900 INFO L225 Difference]: With dead ends: 108 [2022-01-31 20:58:54,900 INFO L226 Difference]: Without dead ends: 102 [2022-01-31 20:58:54,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1153, Invalid=2629, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 20:58:54,901 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 119 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:58:54,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 65 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:58:54,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-01-31 20:58:54,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 54. [2022-01-31 20:58:54,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:54,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-01-31 20:58:54,907 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 51 [2022-01-31 20:58:54,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:58:54,908 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-01-31 20:58:54,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 22 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:54,908 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-01-31 20:58:54,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 20:58:54,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:58:54,908 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:58:54,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 20:58:54,908 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:58:54,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:58:54,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1155838889, now seen corresponding path program 17 times [2022-01-31 20:58:54,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:58:54,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282399244] [2022-01-31 20:58:54,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:58:54,977 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:58:54,977 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:58:54,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:58:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:55,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:58:55,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:55,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:58:55,219 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:58:55,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282399244] [2022-01-31 20:58:55,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [282399244] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:58:55,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:58:55,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 20:58:55,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870071832] [2022-01-31 20:58:55,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:58:55,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 20:58:55,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:58:55,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 20:58:55,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2022-01-31 20:58:55,220 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 23 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:55,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:58:55,847 INFO L93 Difference]: Finished difference Result 113 states and 131 transitions. [2022-01-31 20:58:55,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 20:58:55,848 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 23 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-01-31 20:58:55,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:58:55,848 INFO L225 Difference]: With dead ends: 113 [2022-01-31 20:58:55,849 INFO L226 Difference]: Without dead ends: 107 [2022-01-31 20:58:55,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1273, Invalid=2887, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 20:58:55,850 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 173 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:58:55,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 40 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:58:55,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-31 20:58:55,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 56. [2022-01-31 20:58:55,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:55,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2022-01-31 20:58:55,857 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 53 [2022-01-31 20:58:55,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:58:55,857 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2022-01-31 20:58:55,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 23 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:55,857 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2022-01-31 20:58:55,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 20:58:55,858 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:58:55,858 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:58:55,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 20:58:55,858 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:58:55,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:58:55,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1993853148, now seen corresponding path program 18 times [2022-01-31 20:58:55,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:58:55,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284911144] [2022-01-31 20:58:55,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:58:55,929 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:58:55,929 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:58:55,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:58:55,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:56,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:58:56,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:56,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:58:56,177 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:58:56,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284911144] [2022-01-31 20:58:56,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [284911144] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:58:56,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:58:56,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 20:58:56,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029038519] [2022-01-31 20:58:56,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:58:56,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 20:58:56,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:58:56,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 20:58:56,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2022-01-31 20:58:56,178 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 24 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:56,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:58:56,807 INFO L93 Difference]: Finished difference Result 118 states and 137 transitions. [2022-01-31 20:58:56,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 20:58:56,807 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 24 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-01-31 20:58:56,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:58:56,808 INFO L225 Difference]: With dead ends: 118 [2022-01-31 20:58:56,808 INFO L226 Difference]: Without dead ends: 112 [2022-01-31 20:58:56,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1399, Invalid=3157, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 20:58:56,809 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 163 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:58:56,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 45 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:58:56,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-01-31 20:58:56,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 58. [2022-01-31 20:58:56,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:56,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-01-31 20:58:56,815 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 55 [2022-01-31 20:58:56,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:58:56,816 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-01-31 20:58:56,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 24 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:56,816 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-01-31 20:58:56,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 20:58:56,816 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:58:56,816 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:58:56,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 20:58:56,816 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:58:56,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:58:56,817 INFO L85 PathProgramCache]: Analyzing trace with hash -895957025, now seen corresponding path program 19 times [2022-01-31 20:58:56,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:58:56,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669479425] [2022-01-31 20:58:56,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:58:56,883 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:58:56,883 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:58:56,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:58:56,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:57,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:58:57,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:57,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:58:57,147 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:58:57,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669479425] [2022-01-31 20:58:57,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1669479425] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:58:57,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:58:57,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 20:58:57,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712177346] [2022-01-31 20:58:57,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:58:57,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 20:58:57,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:58:57,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 20:58:57,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=441, Unknown=0, NotChecked=0, Total=702 [2022-01-31 20:58:57,149 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 25 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:57,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:58:57,888 INFO L93 Difference]: Finished difference Result 123 states and 143 transitions. [2022-01-31 20:58:57,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 20:58:57,890 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 25 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-01-31 20:58:57,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:58:57,891 INFO L225 Difference]: With dead ends: 123 [2022-01-31 20:58:57,891 INFO L226 Difference]: Without dead ends: 117 [2022-01-31 20:58:57,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1531, Invalid=3439, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 20:58:57,892 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 172 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:58:57,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 45 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:58:57,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-01-31 20:58:57,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 60. [2022-01-31 20:58:57,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:57,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2022-01-31 20:58:57,899 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 57 [2022-01-31 20:58:57,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:58:57,899 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2022-01-31 20:58:57,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 25 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:57,899 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2022-01-31 20:58:57,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 20:58:57,901 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:58:57,901 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:58:57,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 20:58:57,901 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:58:57,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:58:57,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1915229658, now seen corresponding path program 20 times [2022-01-31 20:58:57,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:58:57,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974354152] [2022-01-31 20:58:57,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:58:58,002 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:58:58,002 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:58:58,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:58:58,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:58,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:58:58,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:58,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:58:58,200 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:58:58,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974354152] [2022-01-31 20:58:58,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [974354152] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:58:58,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:58:58,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 20:58:58,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621956372] [2022-01-31 20:58:58,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:58:58,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 20:58:58,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:58:58,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 20:58:58,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=472, Unknown=0, NotChecked=0, Total=756 [2022-01-31 20:58:58,201 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 26 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:58,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:58:58,972 INFO L93 Difference]: Finished difference Result 128 states and 149 transitions. [2022-01-31 20:58:58,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 20:58:58,972 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 26 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-01-31 20:58:58,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:58:58,973 INFO L225 Difference]: With dead ends: 128 [2022-01-31 20:58:58,973 INFO L226 Difference]: Without dead ends: 122 [2022-01-31 20:58:58,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1669, Invalid=3733, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 20:58:58,975 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 218 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:58:58,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 40 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:58:58,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-01-31 20:58:58,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 62. [2022-01-31 20:58:58,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:58,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2022-01-31 20:58:58,982 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 59 [2022-01-31 20:58:58,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:58:58,983 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2022-01-31 20:58:58,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 26 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:58,983 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2022-01-31 20:58:58,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 20:58:58,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:58:58,983 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:58:58,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 20:58:58,983 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:58:58,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:58:58,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1931202837, now seen corresponding path program 21 times [2022-01-31 20:58:58,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:58:58,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649986754] [2022-01-31 20:58:58,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:58:59,065 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:58:59,065 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:58:59,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:58:59,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:59,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:58:59,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:59,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:58:59,366 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:58:59,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649986754] [2022-01-31 20:58:59,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [649986754] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:58:59,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:58:59,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 20:58:59,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77510754] [2022-01-31 20:58:59,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:58:59,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 20:58:59,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:58:59,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 20:58:59,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=504, Unknown=0, NotChecked=0, Total=812 [2022-01-31 20:58:59,368 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 27 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:00,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:59:00,102 INFO L93 Difference]: Finished difference Result 133 states and 155 transitions. [2022-01-31 20:59:00,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 20:59:00,103 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 27 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-01-31 20:59:00,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:59:00,103 INFO L225 Difference]: With dead ends: 133 [2022-01-31 20:59:00,103 INFO L226 Difference]: Without dead ends: 127 [2022-01-31 20:59:00,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1441 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1813, Invalid=4039, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 20:59:00,105 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 223 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:59:00,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 40 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:59:00,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-01-31 20:59:00,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 64. [2022-01-31 20:59:00,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:00,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2022-01-31 20:59:00,115 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 61 [2022-01-31 20:59:00,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:59:00,115 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2022-01-31 20:59:00,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 27 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:00,116 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2022-01-31 20:59:00,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 20:59:00,116 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:59:00,116 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:59:00,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 20:59:00,116 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:59:00,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:59:00,117 INFO L85 PathProgramCache]: Analyzing trace with hash 101558672, now seen corresponding path program 22 times [2022-01-31 20:59:00,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:59:00,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846412084] [2022-01-31 20:59:00,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:59:00,195 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:59:00,195 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:59:00,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:59:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:00,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:59:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:59:00,509 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:59:00,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846412084] [2022-01-31 20:59:00,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [846412084] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:59:00,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:59:00,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 20:59:00,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768113550] [2022-01-31 20:59:00,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:59:00,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 20:59:00,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:59:00,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 20:59:00,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=537, Unknown=0, NotChecked=0, Total=870 [2022-01-31 20:59:00,511 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 28 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:01,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:59:01,500 INFO L93 Difference]: Finished difference Result 138 states and 161 transitions. [2022-01-31 20:59:01,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 20:59:01,501 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 28 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-01-31 20:59:01,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:59:01,502 INFO L225 Difference]: With dead ends: 138 [2022-01-31 20:59:01,502 INFO L226 Difference]: Without dead ends: 132 [2022-01-31 20:59:01,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1564 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1963, Invalid=4357, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 20:59:01,504 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 216 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:59:01,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 40 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:59:01,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-01-31 20:59:01,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 66. [2022-01-31 20:59:01,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:01,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2022-01-31 20:59:01,514 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 63 [2022-01-31 20:59:01,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:59:01,514 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2022-01-31 20:59:01,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 28 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:01,514 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2022-01-31 20:59:01,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 20:59:01,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:59:01,514 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:59:01,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 20:59:01,515 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:59:01,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:59:01,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1544859829, now seen corresponding path program 23 times [2022-01-31 20:59:01,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:59:01,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268193787] [2022-01-31 20:59:01,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:59:01,593 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:59:01,593 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:59:01,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:59:01,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:01,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:59:01,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:01,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:59:01,945 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:59:01,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268193787] [2022-01-31 20:59:01,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1268193787] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:59:01,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:59:01,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 20:59:01,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208210051] [2022-01-31 20:59:01,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:59:01,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 20:59:01,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:59:01,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 20:59:01,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=571, Unknown=0, NotChecked=0, Total=930 [2022-01-31 20:59:01,947 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 29 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:02,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:59:02,923 INFO L93 Difference]: Finished difference Result 143 states and 167 transitions. [2022-01-31 20:59:02,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 20:59:02,928 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 29 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-01-31 20:59:02,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:59:02,932 INFO L225 Difference]: With dead ends: 143 [2022-01-31 20:59:02,933 INFO L226 Difference]: Without dead ends: 137 [2022-01-31 20:59:02,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1692 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2119, Invalid=4687, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 20:59:02,934 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 195 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:59:02,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 55 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:59:02,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-01-31 20:59:02,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 68. [2022-01-31 20:59:02,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:02,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2022-01-31 20:59:02,950 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 65 [2022-01-31 20:59:02,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:59:02,952 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2022-01-31 20:59:02,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 29 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:02,952 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2022-01-31 20:59:02,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 20:59:02,953 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:59:02,953 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:59:02,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 20:59:02,953 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:59:02,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:59:02,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1089892934, now seen corresponding path program 24 times [2022-01-31 20:59:02,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:59:02,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127437735] [2022-01-31 20:59:02,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:59:03,028 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:59:03,028 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:59:03,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:59:03,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:03,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:59:03,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:59:03,366 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:59:03,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127437735] [2022-01-31 20:59:03,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2127437735] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:59:03,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:59:03,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 20:59:03,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19021262] [2022-01-31 20:59:03,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:59:03,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 20:59:03,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:59:03,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 20:59:03,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=606, Unknown=0, NotChecked=0, Total=992 [2022-01-31 20:59:03,367 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 30 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:04,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:59:04,354 INFO L93 Difference]: Finished difference Result 148 states and 173 transitions. [2022-01-31 20:59:04,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 20:59:04,354 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 30 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-01-31 20:59:04,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:59:04,355 INFO L225 Difference]: With dead ends: 148 [2022-01-31 20:59:04,355 INFO L226 Difference]: Without dead ends: 142 [2022-01-31 20:59:04,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1825 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2281, Invalid=5029, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 20:59:04,356 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 192 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:59:04,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 50 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:59:04,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-01-31 20:59:04,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 70. [2022-01-31 20:59:04,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:04,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2022-01-31 20:59:04,366 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 67 [2022-01-31 20:59:04,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:59:04,366 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2022-01-31 20:59:04,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 30 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:04,366 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2022-01-31 20:59:04,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 20:59:04,367 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:59:04,367 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:59:04,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 20:59:04,368 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:59:04,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:59:04,368 INFO L85 PathProgramCache]: Analyzing trace with hash -943406463, now seen corresponding path program 25 times [2022-01-31 20:59:04,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:59:04,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97136537] [2022-01-31 20:59:04,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:59:04,418 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:59:04,418 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:59:04,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:59:04,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:04,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:59:04,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:04,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:59:04,780 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:59:04,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97136537] [2022-01-31 20:59:04,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [97136537] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:59:04,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:59:04,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 20:59:04,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277742457] [2022-01-31 20:59:04,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:59:04,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 20:59:04,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:59:04,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 20:59:04,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=642, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 20:59:04,782 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 31 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:05,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:59:05,841 INFO L93 Difference]: Finished difference Result 153 states and 179 transitions. [2022-01-31 20:59:05,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 20:59:05,841 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 31 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-01-31 20:59:05,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:59:05,842 INFO L225 Difference]: With dead ends: 153 [2022-01-31 20:59:05,842 INFO L226 Difference]: Without dead ends: 147 [2022-01-31 20:59:05,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1963 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2449, Invalid=5383, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 20:59:05,846 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 227 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:59:05,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 45 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:59:05,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-01-31 20:59:05,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 72. [2022-01-31 20:59:05,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:05,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2022-01-31 20:59:05,859 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 69 [2022-01-31 20:59:05,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:59:05,859 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2022-01-31 20:59:05,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 31 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:05,859 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2022-01-31 20:59:05,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 20:59:05,867 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:59:05,867 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:59:05,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 20:59:05,867 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:59:05,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:59:05,868 INFO L85 PathProgramCache]: Analyzing trace with hash -734007300, now seen corresponding path program 26 times [2022-01-31 20:59:05,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:59:05,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975451327] [2022-01-31 20:59:05,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:59:05,933 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:59:05,934 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:59:05,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:59:05,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:06,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:59:06,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:06,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:59:06,220 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:59:06,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975451327] [2022-01-31 20:59:06,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1975451327] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:59:06,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:59:06,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 20:59:06,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435775905] [2022-01-31 20:59:06,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:59:06,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 20:59:06,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:59:06,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 20:59:06,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=679, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 20:59:06,222 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 32 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:07,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:59:07,157 INFO L93 Difference]: Finished difference Result 158 states and 185 transitions. [2022-01-31 20:59:07,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 20:59:07,157 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 32 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-01-31 20:59:07,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:59:07,157 INFO L225 Difference]: With dead ends: 158 [2022-01-31 20:59:07,158 INFO L226 Difference]: Without dead ends: 152 [2022-01-31 20:59:07,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2106 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2623, Invalid=5749, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 20:59:07,179 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 243 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:59:07,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 45 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:59:07,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-31 20:59:07,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 74. [2022-01-31 20:59:07,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:07,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2022-01-31 20:59:07,191 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 71 [2022-01-31 20:59:07,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:59:07,191 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2022-01-31 20:59:07,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 32 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:07,191 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2022-01-31 20:59:07,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 20:59:07,191 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:59:07,191 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:59:07,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 20:59:07,191 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:59:07,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:59:07,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1364874569, now seen corresponding path program 27 times [2022-01-31 20:59:07,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:59:07,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432850010] [2022-01-31 20:59:07,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:59:07,245 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:59:07,245 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:59:07,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:59:07,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:07,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:59:07,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:07,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:59:07,642 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:59:07,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432850010] [2022-01-31 20:59:07,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1432850010] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:59:07,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:59:07,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 20:59:07,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78598628] [2022-01-31 20:59:07,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:59:07,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 20:59:07,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:59:07,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 20:59:07,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=717, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 20:59:07,643 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 33 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:09,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:59:09,063 INFO L93 Difference]: Finished difference Result 163 states and 191 transitions. [2022-01-31 20:59:09,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 20:59:09,064 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 33 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-01-31 20:59:09,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:59:09,064 INFO L225 Difference]: With dead ends: 163 [2022-01-31 20:59:09,065 INFO L226 Difference]: Without dead ends: 157 [2022-01-31 20:59:09,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2254 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2803, Invalid=6127, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 20:59:09,065 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 258 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:59:09,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 45 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:59:09,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-01-31 20:59:09,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 76. [2022-01-31 20:59:09,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:09,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2022-01-31 20:59:09,077 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 73 [2022-01-31 20:59:09,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:59:09,077 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2022-01-31 20:59:09,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 33 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:09,077 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2022-01-31 20:59:09,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 20:59:09,078 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:59:09,078 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:59:09,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 20:59:09,078 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:59:09,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:59:09,078 INFO L85 PathProgramCache]: Analyzing trace with hash -2037931342, now seen corresponding path program 28 times [2022-01-31 20:59:09,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:59:09,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686388268] [2022-01-31 20:59:09,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:59:09,146 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:59:09,146 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:59:09,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:59:09,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:09,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:59:09,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:09,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:59:09,570 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:59:09,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686388268] [2022-01-31 20:59:09,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1686388268] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:59:09,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:59:09,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 20:59:09,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814131750] [2022-01-31 20:59:09,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:59:09,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 20:59:09,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:59:09,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 20:59:09,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=756, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 20:59:09,572 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 34 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:11,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:59:11,087 INFO L93 Difference]: Finished difference Result 168 states and 197 transitions. [2022-01-31 20:59:11,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 20:59:11,088 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 34 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-01-31 20:59:11,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:59:11,089 INFO L225 Difference]: With dead ends: 168 [2022-01-31 20:59:11,089 INFO L226 Difference]: Without dead ends: 162 [2022-01-31 20:59:11,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2407 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2989, Invalid=6517, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 20:59:11,090 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 241 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 407 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:59:11,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 45 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [407 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:59:11,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-01-31 20:59:11,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 78. [2022-01-31 20:59:11,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:11,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2022-01-31 20:59:11,114 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 75 [2022-01-31 20:59:11,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:59:11,115 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2022-01-31 20:59:11,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 34 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:11,115 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2022-01-31 20:59:11,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 20:59:11,115 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:59:11,115 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:59:11,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 20:59:11,115 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:59:11,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:59:11,116 INFO L85 PathProgramCache]: Analyzing trace with hash -305428499, now seen corresponding path program 29 times [2022-01-31 20:59:11,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:59:11,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103671617] [2022-01-31 20:59:11,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:59:11,179 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:59:11,180 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:59:11,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:59:11,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:11,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:59:11,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:11,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:59:11,678 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:59:11,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103671617] [2022-01-31 20:59:11,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2103671617] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:59:11,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:59:11,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 20:59:11,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752975220] [2022-01-31 20:59:11,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:59:11,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 20:59:11,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:59:11,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 20:59:11,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=796, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 20:59:11,680 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 35 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:13,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:59:13,217 INFO L93 Difference]: Finished difference Result 173 states and 203 transitions. [2022-01-31 20:59:13,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 20:59:13,218 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 35 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-01-31 20:59:13,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:59:13,218 INFO L225 Difference]: With dead ends: 173 [2022-01-31 20:59:13,218 INFO L226 Difference]: Without dead ends: 167 [2022-01-31 20:59:13,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2565 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3181, Invalid=6919, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 20:59:13,219 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 252 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:59:13,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 60 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:59:13,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-01-31 20:59:13,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 80. [2022-01-31 20:59:13,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:13,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2022-01-31 20:59:13,234 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 77 [2022-01-31 20:59:13,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:59:13,234 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2022-01-31 20:59:13,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 35 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:13,234 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2022-01-31 20:59:13,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 20:59:13,234 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:59:13,234 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:59:13,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 20:59:13,234 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:59:13,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:59:13,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1817507224, now seen corresponding path program 30 times [2022-01-31 20:59:13,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:59:13,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097255859] [2022-01-31 20:59:13,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:59:13,301 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:59:13,301 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:59:13,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:59:13,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:13,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:59:13,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:13,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:59:13,633 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:59:13,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097255859] [2022-01-31 20:59:13,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2097255859] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:59:13,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:59:13,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 20:59:13,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133949426] [2022-01-31 20:59:13,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:59:13,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 20:59:13,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:59:13,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 20:59:13,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=837, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 20:59:13,634 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 36 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:14,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:59:14,963 INFO L93 Difference]: Finished difference Result 178 states and 209 transitions. [2022-01-31 20:59:14,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 20:59:14,964 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 36 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-01-31 20:59:14,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:59:14,964 INFO L225 Difference]: With dead ends: 178 [2022-01-31 20:59:14,964 INFO L226 Difference]: Without dead ends: 172 [2022-01-31 20:59:14,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2728 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3379, Invalid=7333, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 20:59:14,966 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 359 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 518 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 518 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:59:14,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 40 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [518 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:59:14,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-01-31 20:59:14,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 82. [2022-01-31 20:59:14,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:14,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2022-01-31 20:59:14,981 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 79 [2022-01-31 20:59:14,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:59:14,981 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2022-01-31 20:59:14,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 36 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:14,981 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2022-01-31 20:59:14,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 20:59:14,982 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:59:14,982 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:59:14,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 20:59:14,982 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:59:14,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:59:14,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1068751395, now seen corresponding path program 31 times [2022-01-31 20:59:14,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:59:14,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701686299] [2022-01-31 20:59:14,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:59:15,035 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:59:15,036 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:59:15,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:59:15,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:15,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:59:15,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:15,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:59:15,408 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:59:15,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701686299] [2022-01-31 20:59:15,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1701686299] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:59:15,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:59:15,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 20:59:15,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565830933] [2022-01-31 20:59:15,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:59:15,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 20:59:15,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:59:15,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 20:59:15,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=879, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 20:59:15,410 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 37 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:17,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:59:17,001 INFO L93 Difference]: Finished difference Result 183 states and 215 transitions. [2022-01-31 20:59:17,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 20:59:17,002 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 37 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-01-31 20:59:17,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:59:17,003 INFO L225 Difference]: With dead ends: 183 [2022-01-31 20:59:17,003 INFO L226 Difference]: Without dead ends: 177 [2022-01-31 20:59:17,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2896 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3583, Invalid=7759, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 20:59:17,004 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 257 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:59:17,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 50 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:59:17,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-01-31 20:59:17,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 84. [2022-01-31 20:59:17,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:17,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2022-01-31 20:59:17,025 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 81 [2022-01-31 20:59:17,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:59:17,026 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2022-01-31 20:59:17,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 37 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:17,026 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2022-01-31 20:59:17,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 20:59:17,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:59:17,027 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:59:17,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 20:59:17,027 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:59:17,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:59:17,027 INFO L85 PathProgramCache]: Analyzing trace with hash 214411038, now seen corresponding path program 32 times [2022-01-31 20:59:17,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:59:17,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824571342] [2022-01-31 20:59:17,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:59:17,130 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:59:17,130 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:59:17,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:59:17,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:17,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:59:17,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:17,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:59:17,648 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:59:17,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824571342] [2022-01-31 20:59:17,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [824571342] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:59:17,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:59:17,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 20:59:17,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109738106] [2022-01-31 20:59:17,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:59:17,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 20:59:17,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:59:17,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 20:59:17,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=638, Invalid=922, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 20:59:17,650 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 40 states, 40 states have (on average 1.975) internal successors, (79), 38 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:19,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:59:19,466 INFO L93 Difference]: Finished difference Result 188 states and 221 transitions. [2022-01-31 20:59:19,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 20:59:19,467 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 38 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-01-31 20:59:19,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:59:19,468 INFO L225 Difference]: With dead ends: 188 [2022-01-31 20:59:19,468 INFO L226 Difference]: Without dead ends: 182 [2022-01-31 20:59:19,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3069 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3793, Invalid=8197, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 20:59:19,469 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 248 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:59:19,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 60 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:59:19,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-01-31 20:59:19,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 86. [2022-01-31 20:59:19,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:19,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2022-01-31 20:59:19,484 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 83 [2022-01-31 20:59:19,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:59:19,485 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2022-01-31 20:59:19,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 38 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:19,485 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2022-01-31 20:59:19,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-31 20:59:19,485 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:59:19,485 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:59:19,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 20:59:19,485 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:59:19,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:59:19,485 INFO L85 PathProgramCache]: Analyzing trace with hash -467918503, now seen corresponding path program 33 times [2022-01-31 20:59:19,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:59:19,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109182339] [2022-01-31 20:59:19,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:59:19,556 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:59:19,556 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:59:19,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:59:19,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:20,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:59:20,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:20,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:59:20,077 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:59:20,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109182339] [2022-01-31 20:59:20,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1109182339] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:59:20,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:59:20,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 20:59:20,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093763477] [2022-01-31 20:59:20,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:59:20,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 20:59:20,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:59:20,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 20:59:20,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=966, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 20:59:20,079 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 39 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:21,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:59:21,607 INFO L93 Difference]: Finished difference Result 193 states and 227 transitions. [2022-01-31 20:59:21,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 20:59:21,607 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 39 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-01-31 20:59:21,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:59:21,608 INFO L225 Difference]: With dead ends: 193 [2022-01-31 20:59:21,608 INFO L226 Difference]: Without dead ends: 187 [2022-01-31 20:59:21,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3247 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4009, Invalid=8647, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 20:59:21,609 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 296 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:59:21,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 60 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:59:21,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-01-31 20:59:21,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 88. [2022-01-31 20:59:21,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:21,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2022-01-31 20:59:21,626 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 85 [2022-01-31 20:59:21,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:59:21,626 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2022-01-31 20:59:21,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 39 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:21,626 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2022-01-31 20:59:21,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 20:59:21,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:59:21,626 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:59:21,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 20:59:21,627 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:59:21,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:59:21,627 INFO L85 PathProgramCache]: Analyzing trace with hash 943388884, now seen corresponding path program 34 times [2022-01-31 20:59:21,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:59:21,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598651608] [2022-01-31 20:59:21,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:59:21,685 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:59:21,685 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:59:21,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:59:21,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:22,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:59:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:22,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:59:22,171 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:59:22,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598651608] [2022-01-31 20:59:22,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [598651608] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:59:22,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:59:22,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 20:59:22,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295209861] [2022-01-31 20:59:22,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:59:22,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 20:59:22,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:59:22,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 20:59:22,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=1011, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 20:59:22,174 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 42 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 40 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:24,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:59:24,280 INFO L93 Difference]: Finished difference Result 198 states and 233 transitions. [2022-01-31 20:59:24,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 20:59:24,280 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 40 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-01-31 20:59:24,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:59:24,281 INFO L225 Difference]: With dead ends: 198 [2022-01-31 20:59:24,281 INFO L226 Difference]: Without dead ends: 192 [2022-01-31 20:59:24,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3430 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4231, Invalid=9109, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 20:59:24,283 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 274 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 467 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 467 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:59:24,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 55 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [467 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:59:24,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-01-31 20:59:24,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 90. [2022-01-31 20:59:24,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:24,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2022-01-31 20:59:24,300 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 87 [2022-01-31 20:59:24,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:59:24,300 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2022-01-31 20:59:24,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 40 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:24,300 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2022-01-31 20:59:24,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 20:59:24,311 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:59:24,311 INFO L514 BasicCegarLoop]: trace histogram [36, 35, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:59:24,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 20:59:24,311 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:59:24,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:59:24,311 INFO L85 PathProgramCache]: Analyzing trace with hash 122255, now seen corresponding path program 35 times [2022-01-31 20:59:24,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:59:24,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961716768] [2022-01-31 20:59:24,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:59:24,359 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:59:24,359 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:59:24,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:59:24,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:24,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:59:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:24,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:59:24,966 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:59:24,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961716768] [2022-01-31 20:59:24,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [961716768] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:59:24,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:59:24,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 20:59:24,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416355819] [2022-01-31 20:59:24,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:59:24,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 20:59:24,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:59:24,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 20:59:24,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=1057, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 20:59:24,967 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 41 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:27,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:59:27,290 INFO L93 Difference]: Finished difference Result 203 states and 239 transitions. [2022-01-31 20:59:27,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 20:59:27,290 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 41 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-01-31 20:59:27,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:59:27,291 INFO L225 Difference]: With dead ends: 203 [2022-01-31 20:59:27,291 INFO L226 Difference]: Without dead ends: 197 [2022-01-31 20:59:27,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3618 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4459, Invalid=9583, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 20:59:27,294 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 272 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:59:27,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 50 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:59:27,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-01-31 20:59:27,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 92. [2022-01-31 20:59:27,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:27,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2022-01-31 20:59:27,315 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 89 [2022-01-31 20:59:27,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:59:27,315 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2022-01-31 20:59:27,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 41 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:27,315 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2022-01-31 20:59:27,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 20:59:27,316 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:59:27,316 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:59:27,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 20:59:27,316 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:59:27,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:59:27,316 INFO L85 PathProgramCache]: Analyzing trace with hash -241008758, now seen corresponding path program 36 times [2022-01-31 20:59:27,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:59:27,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833221603] [2022-01-31 20:59:27,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:59:27,364 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:59:27,364 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:59:27,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:59:27,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:27,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:59:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:27,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:59:27,815 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:59:27,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833221603] [2022-01-31 20:59:27,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [833221603] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:59:27,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:59:27,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 20:59:27,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118391397] [2022-01-31 20:59:27,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:59:27,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 20:59:27,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:59:27,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 20:59:27,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=788, Invalid=1104, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 20:59:27,817 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 42 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:29,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:59:29,999 INFO L93 Difference]: Finished difference Result 208 states and 245 transitions. [2022-01-31 20:59:29,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 20:59:29,999 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 42 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-01-31 20:59:29,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:59:30,000 INFO L225 Difference]: With dead ends: 208 [2022-01-31 20:59:30,000 INFO L226 Difference]: Without dead ends: 202 [2022-01-31 20:59:30,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3811 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4693, Invalid=10069, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 20:59:30,002 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 270 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:59:30,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 55 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:59:30,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-01-31 20:59:30,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 94. [2022-01-31 20:59:30,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:30,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2022-01-31 20:59:30,029 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 91 [2022-01-31 20:59:30,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:59:30,029 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2022-01-31 20:59:30,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 42 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:30,029 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2022-01-31 20:59:30,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 20:59:30,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:59:30,030 INFO L514 BasicCegarLoop]: trace histogram [38, 37, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:59:30,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 20:59:30,030 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:59:30,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:59:30,030 INFO L85 PathProgramCache]: Analyzing trace with hash -39678267, now seen corresponding path program 37 times [2022-01-31 20:59:30,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:59:30,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194401260] [2022-01-31 20:59:30,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:59:30,080 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:59:30,080 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:59:30,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:59:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:30,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:59:30,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:30,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:59:30,601 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:59:30,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194401260] [2022-01-31 20:59:30,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1194401260] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:59:30,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:59:30,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 20:59:30,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837042746] [2022-01-31 20:59:30,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:59:30,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 20:59:30,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:59:30,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 20:59:30,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=828, Invalid=1152, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 20:59:30,603 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 43 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:33,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:59:33,074 INFO L93 Difference]: Finished difference Result 213 states and 251 transitions. [2022-01-31 20:59:33,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 20:59:33,074 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 43 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-01-31 20:59:33,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:59:33,075 INFO L225 Difference]: With dead ends: 213 [2022-01-31 20:59:33,075 INFO L226 Difference]: Without dead ends: 207 [2022-01-31 20:59:33,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4009 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4933, Invalid=10567, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 20:59:33,077 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 335 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 513 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 513 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:59:33,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 50 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [513 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:59:33,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-01-31 20:59:33,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 96. [2022-01-31 20:59:33,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:33,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2022-01-31 20:59:33,096 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 93 [2022-01-31 20:59:33,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:59:33,097 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2022-01-31 20:59:33,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 43 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:33,097 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2022-01-31 20:59:33,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 20:59:33,097 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:59:33,097 INFO L514 BasicCegarLoop]: trace histogram [39, 38, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:59:33,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 20:59:33,097 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:59:33,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:59:33,098 INFO L85 PathProgramCache]: Analyzing trace with hash 165395264, now seen corresponding path program 38 times [2022-01-31 20:59:33,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:59:33,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503906675] [2022-01-31 20:59:33,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:59:33,146 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:59:33,146 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:59:33,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:59:33,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:33,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:59:33,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:33,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:59:33,632 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:59:33,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503906675] [2022-01-31 20:59:33,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1503906675] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:59:33,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:59:33,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 20:59:33,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136321099] [2022-01-31 20:59:33,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:59:33,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 20:59:33,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:59:33,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 20:59:33,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=1201, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 20:59:33,635 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 44 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:35,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:59:35,769 INFO L93 Difference]: Finished difference Result 218 states and 257 transitions. [2022-01-31 20:59:35,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 20:59:35,769 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 44 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-01-31 20:59:35,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:59:35,770 INFO L225 Difference]: With dead ends: 218 [2022-01-31 20:59:35,770 INFO L226 Difference]: Without dead ends: 212 [2022-01-31 20:59:35,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4212 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=5179, Invalid=11077, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 20:59:35,772 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 313 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 525 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 525 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:59:35,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 50 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [525 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:59:35,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-31 20:59:35,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 98. [2022-01-31 20:59:35,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:35,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2022-01-31 20:59:35,793 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 95 [2022-01-31 20:59:35,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:59:35,793 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2022-01-31 20:59:35,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 44 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:35,794 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2022-01-31 20:59:35,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-31 20:59:35,794 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:59:35,794 INFO L514 BasicCegarLoop]: trace histogram [40, 39, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:59:35,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 20:59:35,794 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:59:35,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:59:35,794 INFO L85 PathProgramCache]: Analyzing trace with hash -327437061, now seen corresponding path program 39 times [2022-01-31 20:59:35,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:59:35,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330107008] [2022-01-31 20:59:35,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:59:35,904 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:59:35,904 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:59:35,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:59:35,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:36,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:59:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:36,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:59:36,635 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:59:36,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330107008] [2022-01-31 20:59:36,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1330107008] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:59:36,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:59:36,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 20:59:36,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806904128] [2022-01-31 20:59:36,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:59:36,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 20:59:36,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:59:36,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 20:59:36,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=911, Invalid=1251, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 20:59:36,636 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 45 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:39,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:59:39,182 INFO L93 Difference]: Finished difference Result 223 states and 263 transitions. [2022-01-31 20:59:39,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 20:59:39,182 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 45 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-01-31 20:59:39,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:59:39,190 INFO L225 Difference]: With dead ends: 223 [2022-01-31 20:59:39,190 INFO L226 Difference]: Without dead ends: 217 [2022-01-31 20:59:39,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4420 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5431, Invalid=11599, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 20:59:39,193 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 391 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 671 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 671 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:59:39,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 50 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [671 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:59:39,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-01-31 20:59:39,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 100. [2022-01-31 20:59:39,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:39,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2022-01-31 20:59:39,226 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 97 [2022-01-31 20:59:39,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:59:39,226 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2022-01-31 20:59:39,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 45 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:39,226 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2022-01-31 20:59:39,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-31 20:59:39,227 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:59:39,227 INFO L514 BasicCegarLoop]: trace histogram [41, 40, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:59:39,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 20:59:39,227 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:59:39,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:59:39,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1492898826, now seen corresponding path program 40 times [2022-01-31 20:59:39,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:59:39,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165678013] [2022-01-31 20:59:39,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:59:39,297 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:59:39,297 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:59:39,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:59:39,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:39,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:59:39,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:59:40,023 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:59:40,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165678013] [2022-01-31 20:59:40,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [165678013] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:59:40,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:59:40,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 20:59:40,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718949415] [2022-01-31 20:59:40,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:59:40,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 20:59:40,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:59:40,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 20:59:40,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=954, Invalid=1302, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 20:59:40,024 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 46 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:42,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:59:42,739 INFO L93 Difference]: Finished difference Result 228 states and 269 transitions. [2022-01-31 20:59:42,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 20:59:42,739 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 46 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2022-01-31 20:59:42,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:59:42,742 INFO L225 Difference]: With dead ends: 228 [2022-01-31 20:59:42,742 INFO L226 Difference]: Without dead ends: 222 [2022-01-31 20:59:42,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4633 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5689, Invalid=12133, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 20:59:42,749 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 328 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:59:42,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 55 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [527 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:59:42,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-01-31 20:59:42,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 102. [2022-01-31 20:59:42,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 97 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:42,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2022-01-31 20:59:42,794 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 99 [2022-01-31 20:59:42,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:59:42,796 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2022-01-31 20:59:42,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 46 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:42,808 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2022-01-31 20:59:42,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-31 20:59:42,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:59:42,809 INFO L514 BasicCegarLoop]: trace histogram [42, 41, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:59:42,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 20:59:42,809 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:59:42,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:59:42,809 INFO L85 PathProgramCache]: Analyzing trace with hash -515190735, now seen corresponding path program 41 times [2022-01-31 20:59:42,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:59:42,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914272409] [2022-01-31 20:59:42,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:59:42,879 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:59:42,879 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:59:42,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:59:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:43,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:59:43,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:43,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:59:43,659 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:59:43,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914272409] [2022-01-31 20:59:43,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [914272409] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:59:43,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:59:43,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 20:59:43,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328234268] [2022-01-31 20:59:43,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:59:43,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 20:59:43,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:59:43,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 20:59:43,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=998, Invalid=1354, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 20:59:43,660 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 47 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:46,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:59:46,418 INFO L93 Difference]: Finished difference Result 233 states and 275 transitions. [2022-01-31 20:59:46,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 20:59:46,418 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 47 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-01-31 20:59:46,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:59:46,420 INFO L225 Difference]: With dead ends: 233 [2022-01-31 20:59:46,420 INFO L226 Difference]: Without dead ends: 227 [2022-01-31 20:59:46,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4851 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5953, Invalid=12679, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 20:59:46,422 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 363 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 610 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:59:46,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 55 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [610 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:59:46,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-01-31 20:59:46,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 104. [2022-01-31 20:59:46,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:46,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2022-01-31 20:59:46,444 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 101 [2022-01-31 20:59:46,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:59:46,444 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2022-01-31 20:59:46,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 47 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:46,444 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2022-01-31 20:59:46,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-31 20:59:46,445 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:59:46,445 INFO L514 BasicCegarLoop]: trace histogram [43, 42, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:59:46,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 20:59:46,445 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:59:46,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:59:46,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1535553108, now seen corresponding path program 42 times [2022-01-31 20:59:46,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:59:46,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763321543] [2022-01-31 20:59:46,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:59:46,502 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:59:46,502 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:59:46,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:59:46,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:47,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:59:47,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:47,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:59:47,285 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:59:47,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763321543] [2022-01-31 20:59:47,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1763321543] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:59:47,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:59:47,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 20:59:47,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021534552] [2022-01-31 20:59:47,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:59:47,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 20:59:47,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:59:47,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 20:59:47,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1043, Invalid=1407, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 20:59:47,286 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 50 states, 50 states have (on average 1.98) internal successors, (99), 48 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:50,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:59:50,246 INFO L93 Difference]: Finished difference Result 238 states and 281 transitions. [2022-01-31 20:59:50,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 20:59:50,247 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.98) internal successors, (99), 48 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-01-31 20:59:50,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:59:50,247 INFO L225 Difference]: With dead ends: 238 [2022-01-31 20:59:50,247 INFO L226 Difference]: Without dead ends: 232 [2022-01-31 20:59:50,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5074 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6223, Invalid=13237, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 20:59:50,249 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 416 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 604 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 604 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:59:50,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 65 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [604 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:59:50,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-01-31 20:59:50,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 106. [2022-01-31 20:59:50,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:50,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2022-01-31 20:59:50,278 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 103 [2022-01-31 20:59:50,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:59:50,278 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2022-01-31 20:59:50,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.98) internal successors, (99), 48 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:50,278 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2022-01-31 20:59:50,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-31 20:59:50,278 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:59:50,278 INFO L514 BasicCegarLoop]: trace histogram [44, 43, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:59:50,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 20:59:50,279 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:59:50,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:59:50,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1443717223, now seen corresponding path program 43 times [2022-01-31 20:59:50,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:59:50,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942349816] [2022-01-31 20:59:50,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:59:50,335 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:59:50,335 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:59:50,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:59:50,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:50,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:59:50,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:50,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:59:51,071 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:59:51,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942349816] [2022-01-31 20:59:51,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1942349816] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:59:51,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:59:51,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 20:59:51,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413982906] [2022-01-31 20:59:51,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:59:51,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 20:59:51,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:59:51,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 20:59:51,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1089, Invalid=1461, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 20:59:51,073 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand has 51 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 49 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:53,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:59:53,980 INFO L93 Difference]: Finished difference Result 243 states and 287 transitions. [2022-01-31 20:59:53,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 20:59:53,980 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 49 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2022-01-31 20:59:53,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:59:53,981 INFO L225 Difference]: With dead ends: 243 [2022-01-31 20:59:53,981 INFO L226 Difference]: Without dead ends: 237 [2022-01-31 20:59:53,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5302 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=6499, Invalid=13807, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 20:59:53,982 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 555 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 814 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 814 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:59:53,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [555 Valid, 35 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [814 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:59:53,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-01-31 20:59:54,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 108. [2022-01-31 20:59:54,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:54,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2022-01-31 20:59:54,007 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 105 [2022-01-31 20:59:54,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:59:54,007 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2022-01-31 20:59:54,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 49 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:54,007 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2022-01-31 20:59:54,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-31 20:59:54,008 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:59:54,008 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:59:54,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 20:59:54,008 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:59:54,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:59:54,008 INFO L85 PathProgramCache]: Analyzing trace with hash -220681118, now seen corresponding path program 44 times [2022-01-31 20:59:54,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:59:54,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730423011] [2022-01-31 20:59:54,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:59:54,076 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:59:54,077 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:59:54,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:59:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:54,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:59:54,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:54,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:59:54,881 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:59:54,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730423011] [2022-01-31 20:59:54,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [730423011] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:59:54,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:59:54,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 20:59:54,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287873070] [2022-01-31 20:59:54,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:59:54,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 20:59:54,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:59:54,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 20:59:54,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1136, Invalid=1516, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 20:59:54,892 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 50 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:57,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:59:57,772 INFO L93 Difference]: Finished difference Result 248 states and 293 transitions. [2022-01-31 20:59:57,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 20:59:57,773 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 50 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-01-31 20:59:57,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:59:57,774 INFO L225 Difference]: With dead ends: 248 [2022-01-31 20:59:57,774 INFO L226 Difference]: Without dead ends: 242 [2022-01-31 20:59:57,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5535 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=6781, Invalid=14389, Unknown=0, NotChecked=0, Total=21170 [2022-01-31 20:59:57,775 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 372 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 625 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 625 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:59:57,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 45 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [625 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:59:57,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-01-31 20:59:57,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 110. [2022-01-31 20:59:57,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:57,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2022-01-31 20:59:57,801 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 107 [2022-01-31 20:59:57,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:59:57,801 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2022-01-31 20:59:57,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 50 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:57,801 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2022-01-31 20:59:57,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-01-31 20:59:57,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:59:57,802 INFO L514 BasicCegarLoop]: trace histogram [46, 45, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:59:57,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 20:59:57,802 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:59:57,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:59:57,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1979652707, now seen corresponding path program 45 times [2022-01-31 20:59:57,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:59:57,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139953471] [2022-01-31 20:59:57,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:59:57,847 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:59:57,848 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:59:57,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:59:57,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:58,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:59:58,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:58,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:59:58,465 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:59:58,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139953471] [2022-01-31 20:59:58,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1139953471] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:59:58,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:59:58,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 20:59:58,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597031494] [2022-01-31 20:59:58,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:59:58,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 20:59:58,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:59:58,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 20:59:58,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1184, Invalid=1572, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 20:59:58,467 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 51 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:02,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:00:02,140 INFO L93 Difference]: Finished difference Result 253 states and 299 transitions. [2022-01-31 21:00:02,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 21:00:02,140 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 51 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2022-01-31 21:00:02,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:00:02,143 INFO L225 Difference]: With dead ends: 253 [2022-01-31 21:00:02,143 INFO L226 Difference]: Without dead ends: 247 [2022-01-31 21:00:02,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5773 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=7069, Invalid=14983, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 21:00:02,145 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 454 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 779 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 779 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:00:02,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 50 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [779 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:00:02,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-01-31 21:00:02,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 112. [2022-01-31 21:00:02,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:02,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2022-01-31 21:00:02,188 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 109 [2022-01-31 21:00:02,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:00:02,188 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2022-01-31 21:00:02,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 51 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:02,188 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2022-01-31 21:00:02,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-31 21:00:02,189 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:00:02,189 INFO L514 BasicCegarLoop]: trace histogram [47, 46, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:00:02,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 21:00:02,189 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:00:02,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:00:02,190 INFO L85 PathProgramCache]: Analyzing trace with hash -134235112, now seen corresponding path program 46 times [2022-01-31 21:00:02,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:00:02,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114898523] [2022-01-31 21:00:02,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:00:02,261 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:00:02,261 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:00:02,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:00:02,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:03,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:00:03,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:03,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:00:03,295 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:00:03,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114898523] [2022-01-31 21:00:03,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [114898523] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:00:03,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:00:03,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 21:00:03,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207124765] [2022-01-31 21:00:03,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:00:03,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 21:00:03,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:00:03,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 21:00:03,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1233, Invalid=1629, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 21:00:03,296 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 54 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 52 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:06,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:00:06,969 INFO L93 Difference]: Finished difference Result 258 states and 305 transitions. [2022-01-31 21:00:06,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 21:00:06,969 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 52 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-01-31 21:00:06,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:00:06,970 INFO L225 Difference]: With dead ends: 258 [2022-01-31 21:00:06,970 INFO L226 Difference]: Without dead ends: 252 [2022-01-31 21:00:06,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6016 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7363, Invalid=15589, Unknown=0, NotChecked=0, Total=22952 [2022-01-31 21:00:06,972 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 437 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 735 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 735 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:00:06,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 60 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [735 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:00:06,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-01-31 21:00:06,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 114. [2022-01-31 21:00:06,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:07,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2022-01-31 21:00:07,000 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 111 [2022-01-31 21:00:07,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:00:07,000 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2022-01-31 21:00:07,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 52 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:07,000 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2022-01-31 21:00:07,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-31 21:00:07,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:00:07,000 INFO L514 BasicCegarLoop]: trace histogram [48, 47, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:00:07,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 21:00:07,002 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:00:07,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:00:07,002 INFO L85 PathProgramCache]: Analyzing trace with hash -509419565, now seen corresponding path program 47 times [2022-01-31 21:00:07,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:00:07,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052661253] [2022-01-31 21:00:07,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:00:07,043 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:00:07,044 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:00:07,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:00:07,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:07,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:00:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:07,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:00:07,993 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:00:07,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052661253] [2022-01-31 21:00:07,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2052661253] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:00:07,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:00:07,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 21:00:07,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286788818] [2022-01-31 21:00:07,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:00:07,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 21:00:07,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:00:07,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 21:00:07,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1283, Invalid=1687, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 21:00:07,994 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 53 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:11,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:00:11,929 INFO L93 Difference]: Finished difference Result 263 states and 311 transitions. [2022-01-31 21:00:11,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 21:00:11,929 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 53 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-01-31 21:00:11,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:00:11,930 INFO L225 Difference]: With dead ends: 263 [2022-01-31 21:00:11,930 INFO L226 Difference]: Without dead ends: 257 [2022-01-31 21:00:11,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6264 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7663, Invalid=16207, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 21:00:11,932 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 414 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 694 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 694 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:00:11,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 60 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [694 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:00:11,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-01-31 21:00:11,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 116. [2022-01-31 21:00:11,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:11,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2022-01-31 21:00:11,985 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 113 [2022-01-31 21:00:11,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:00:11,986 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2022-01-31 21:00:11,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 53 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:11,986 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2022-01-31 21:00:11,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-31 21:00:11,986 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:00:11,986 INFO L514 BasicCegarLoop]: trace histogram [49, 48, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:00:11,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 21:00:11,986 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:00:11,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:00:11,987 INFO L85 PathProgramCache]: Analyzing trace with hash -284426034, now seen corresponding path program 48 times [2022-01-31 21:00:11,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:00:11,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716880963] [2022-01-31 21:00:11,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:00:12,031 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:00:12,032 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:00:12,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:00:12,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:12,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:00:12,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:12,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:00:12,707 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:00:12,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716880963] [2022-01-31 21:00:12,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [716880963] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:00:12,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:00:12,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 21:00:12,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850933393] [2022-01-31 21:00:12,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:00:12,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 21:00:12,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:00:12,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 21:00:12,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1334, Invalid=1746, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 21:00:12,709 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand has 56 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 54 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:16,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:00:16,720 INFO L93 Difference]: Finished difference Result 268 states and 317 transitions. [2022-01-31 21:00:16,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 21:00:16,721 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 54 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2022-01-31 21:00:16,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:00:16,721 INFO L225 Difference]: With dead ends: 268 [2022-01-31 21:00:16,722 INFO L226 Difference]: Without dead ends: 262 [2022-01-31 21:00:16,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6517 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=7969, Invalid=16837, Unknown=0, NotChecked=0, Total=24806 [2022-01-31 21:00:16,723 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 439 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 779 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 779 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:00:16,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 50 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [779 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:00:16,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-01-31 21:00:16,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 118. [2022-01-31 21:00:16,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 113 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:16,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2022-01-31 21:00:16,780 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 115 [2022-01-31 21:00:16,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:00:16,780 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2022-01-31 21:00:16,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 54 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:16,781 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2022-01-31 21:00:16,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-01-31 21:00:16,781 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:00:16,781 INFO L514 BasicCegarLoop]: trace histogram [50, 49, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:00:16,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 21:00:16,781 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:00:16,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:00:16,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1185992457, now seen corresponding path program 49 times [2022-01-31 21:00:16,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:00:16,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560496988] [2022-01-31 21:00:16,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:00:16,848 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:00:16,848 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:00:16,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:00:16,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:17,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:00:17,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:17,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:00:17,929 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:00:17,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560496988] [2022-01-31 21:00:17,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [560496988] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:00:17,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:00:17,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 21:00:17,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950546582] [2022-01-31 21:00:17,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:00:17,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 21:00:17,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:00:17,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 21:00:17,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1386, Invalid=1806, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:00:17,930 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 55 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:22,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:00:22,186 INFO L93 Difference]: Finished difference Result 273 states and 323 transitions. [2022-01-31 21:00:22,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 21:00:22,186 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 55 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2022-01-31 21:00:22,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:00:22,187 INFO L225 Difference]: With dead ends: 273 [2022-01-31 21:00:22,187 INFO L226 Difference]: Without dead ends: 267 [2022-01-31 21:00:22,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6775 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=8281, Invalid=17479, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 21:00:22,189 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 573 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 923 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 923 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:00:22,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 55 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [923 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:00:22,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-01-31 21:00:22,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 120. [2022-01-31 21:00:22,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.017391304347826) internal successors, (117), 115 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:22,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2022-01-31 21:00:22,231 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 117 [2022-01-31 21:00:22,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:00:22,231 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2022-01-31 21:00:22,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 55 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:22,231 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2022-01-31 21:00:22,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-01-31 21:00:22,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:00:22,232 INFO L514 BasicCegarLoop]: trace histogram [51, 50, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:00:22,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 21:00:22,232 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:00:22,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:00:22,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1213921924, now seen corresponding path program 50 times [2022-01-31 21:00:22,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:00:22,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234473708] [2022-01-31 21:00:22,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:00:22,296 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:00:22,297 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:00:22,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:00:22,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:23,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:00:23,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:23,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:00:23,249 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:00:23,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234473708] [2022-01-31 21:00:23,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [234473708] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:00:23,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:00:23,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 21:00:23,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278889439] [2022-01-31 21:00:23,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:00:23,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 21:00:23,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:00:23,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 21:00:23,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1439, Invalid=1867, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 21:00:23,251 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 58 states, 58 states have (on average 1.9827586206896552) internal successors, (115), 56 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:27,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:00:27,894 INFO L93 Difference]: Finished difference Result 278 states and 329 transitions. [2022-01-31 21:00:27,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 21:00:27,894 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9827586206896552) internal successors, (115), 56 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-01-31 21:00:27,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:00:27,895 INFO L225 Difference]: With dead ends: 278 [2022-01-31 21:00:27,895 INFO L226 Difference]: Without dead ends: 272 [2022-01-31 21:00:27,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7038 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=8599, Invalid=18133, Unknown=0, NotChecked=0, Total=26732 [2022-01-31 21:00:27,897 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 435 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 674 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 674 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:00:27,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 55 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [674 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:00:27,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-01-31 21:00:27,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 122. [2022-01-31 21:00:27,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:27,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2022-01-31 21:00:27,955 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 119 [2022-01-31 21:00:27,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:00:27,955 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2022-01-31 21:00:27,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9827586206896552) internal successors, (115), 56 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:27,955 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2022-01-31 21:00:27,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-01-31 21:00:27,956 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:00:27,956 INFO L514 BasicCegarLoop]: trace histogram [52, 51, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:00:27,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 21:00:27,956 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:00:27,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:00:27,956 INFO L85 PathProgramCache]: Analyzing trace with hash -2010631361, now seen corresponding path program 51 times [2022-01-31 21:00:27,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:00:27,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87473963] [2022-01-31 21:00:27,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:00:28,021 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:00:28,021 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:00:28,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:00:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:28,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:00:28,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:28,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:00:29,055 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:00:29,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87473963] [2022-01-31 21:00:29,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [87473963] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:00:29,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:00:29,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 21:00:29,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72725578] [2022-01-31 21:00:29,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:00:29,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 21:00:29,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:00:29,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 21:00:29,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1493, Invalid=1929, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 21:00:29,057 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 57 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:33,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:00:33,596 INFO L93 Difference]: Finished difference Result 283 states and 335 transitions. [2022-01-31 21:00:33,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 21:00:33,596 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 57 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2022-01-31 21:00:33,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:00:33,597 INFO L225 Difference]: With dead ends: 283 [2022-01-31 21:00:33,597 INFO L226 Difference]: Without dead ends: 277 [2022-01-31 21:00:33,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7306 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=8923, Invalid=18799, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 21:00:33,603 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 407 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 736 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 736 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:00:33,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 65 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [736 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:00:33,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-01-31 21:00:33,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 124. [2022-01-31 21:00:33,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 119 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:33,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2022-01-31 21:00:33,639 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 121 [2022-01-31 21:00:33,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:00:33,640 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2022-01-31 21:00:33,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 57 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:33,640 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2022-01-31 21:00:33,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-01-31 21:00:33,640 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:00:33,641 INFO L514 BasicCegarLoop]: trace histogram [53, 52, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:00:33,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 21:00:33,641 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:00:33,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:00:33,641 INFO L85 PathProgramCache]: Analyzing trace with hash 160049466, now seen corresponding path program 52 times [2022-01-31 21:00:33,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:00:33,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973488468] [2022-01-31 21:00:33,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:00:33,684 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:00:33,684 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:00:33,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:00:33,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:34,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:00:34,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:34,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:00:34,829 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:00:34,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973488468] [2022-01-31 21:00:34,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1973488468] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:00:34,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:00:34,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 21:00:34,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640466397] [2022-01-31 21:00:34,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:00:34,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 21:00:34,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:00:34,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 21:00:34,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1548, Invalid=1992, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 21:00:34,831 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 58 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:40,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:00:40,036 INFO L93 Difference]: Finished difference Result 288 states and 341 transitions. [2022-01-31 21:00:40,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 21:00:40,037 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 58 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2022-01-31 21:00:40,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:00:40,038 INFO L225 Difference]: With dead ends: 288 [2022-01-31 21:00:40,038 INFO L226 Difference]: Without dead ends: 282 [2022-01-31 21:00:40,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7579 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=9253, Invalid=19477, Unknown=0, NotChecked=0, Total=28730 [2022-01-31 21:00:40,040 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 483 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 818 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 818 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:00:40,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 40 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [818 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:00:40,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-01-31 21:00:40,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 126. [2022-01-31 21:00:40,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.0165289256198347) internal successors, (123), 121 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:40,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2022-01-31 21:00:40,082 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 123 [2022-01-31 21:00:40,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:00:40,082 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2022-01-31 21:00:40,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 58 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:40,083 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2022-01-31 21:00:40,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-01-31 21:00:40,083 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:00:40,083 INFO L514 BasicCegarLoop]: trace histogram [54, 53, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:00:40,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 21:00:40,083 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:00:40,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:00:40,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1169781643, now seen corresponding path program 53 times [2022-01-31 21:00:40,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:00:40,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492171105] [2022-01-31 21:00:40,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:00:40,123 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:00:40,124 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:00:40,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:00:40,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:40,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:00:40,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:40,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:00:40,878 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:00:40,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492171105] [2022-01-31 21:00:40,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [492171105] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:00:40,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:00:40,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 21:00:40,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403827856] [2022-01-31 21:00:40,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:00:40,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 21:00:40,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:00:40,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 21:00:40,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1604, Invalid=2056, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:00:40,880 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 59 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:46,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:00:46,179 INFO L93 Difference]: Finished difference Result 293 states and 347 transitions. [2022-01-31 21:00:46,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 21:00:46,180 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 59 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2022-01-31 21:00:46,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:00:46,181 INFO L225 Difference]: With dead ends: 293 [2022-01-31 21:00:46,181 INFO L226 Difference]: Without dead ends: 287 [2022-01-31 21:00:46,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7857 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=9589, Invalid=20167, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 21:00:46,182 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 501 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 850 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 850 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:00:46,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 55 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [850 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:00:46,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-01-31 21:00:46,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 128. [2022-01-31 21:00:46,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.016260162601626) internal successors, (125), 123 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:46,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2022-01-31 21:00:46,228 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 125 [2022-01-31 21:00:46,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:00:46,228 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2022-01-31 21:00:46,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 59 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:46,228 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2022-01-31 21:00:46,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-01-31 21:00:46,229 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:00:46,229 INFO L514 BasicCegarLoop]: trace histogram [55, 54, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:00:46,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 21:00:46,229 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:00:46,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:00:46,229 INFO L85 PathProgramCache]: Analyzing trace with hash 762776816, now seen corresponding path program 54 times [2022-01-31 21:00:46,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:00:46,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315516668] [2022-01-31 21:00:46,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:00:46,303 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:00:46,303 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:00:46,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:00:46,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:47,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:00:47,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:47,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:00:47,522 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:00:47,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315516668] [2022-01-31 21:00:47,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1315516668] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:00:47,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:00:47,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 21:00:47,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498043033] [2022-01-31 21:00:47,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:00:47,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 21:00:47,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:00:47,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 21:00:47,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1661, Invalid=2121, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 21:00:47,524 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand has 62 states, 62 states have (on average 1.9838709677419355) internal successors, (123), 60 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:52,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:00:52,970 INFO L93 Difference]: Finished difference Result 298 states and 353 transitions. [2022-01-31 21:00:52,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 21:00:52,970 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.9838709677419355) internal successors, (123), 60 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2022-01-31 21:00:52,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:00:52,971 INFO L225 Difference]: With dead ends: 298 [2022-01-31 21:00:52,971 INFO L226 Difference]: Without dead ends: 292 [2022-01-31 21:00:52,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8140 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=9931, Invalid=20869, Unknown=0, NotChecked=0, Total=30800 [2022-01-31 21:00:52,973 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 512 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 864 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 864 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:00:52,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 50 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [864 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:00:52,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-01-31 21:00:53,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 130. [2022-01-31 21:00:53,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.016) internal successors, (127), 125 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:53,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2022-01-31 21:00:53,019 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 127 [2022-01-31 21:00:53,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:00:53,019 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2022-01-31 21:00:53,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.9838709677419355) internal successors, (123), 60 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:53,020 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2022-01-31 21:00:53,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-31 21:00:53,020 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:00:53,020 INFO L514 BasicCegarLoop]: trace histogram [56, 55, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:00:53,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 21:00:53,020 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:00:53,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:00:53,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1769383253, now seen corresponding path program 55 times [2022-01-31 21:00:53,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:00:53,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413593637] [2022-01-31 21:00:53,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:00:53,072 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:00:53,072 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:00:53,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:00:53,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:53,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:00:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:53,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:00:53,975 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:00:53,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413593637] [2022-01-31 21:00:53,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [413593637] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:00:53,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:00:53,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 21:00:53,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333791950] [2022-01-31 21:00:53,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:00:53,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 21:00:53,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:00:53,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 21:00:53,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1719, Invalid=2187, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:00:53,977 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand has 63 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 61 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:59,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:00:59,730 INFO L93 Difference]: Finished difference Result 303 states and 359 transitions. [2022-01-31 21:00:59,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 21:00:59,730 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 61 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2022-01-31 21:00:59,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:00:59,731 INFO L225 Difference]: With dead ends: 303 [2022-01-31 21:00:59,731 INFO L226 Difference]: Without dead ends: 297 [2022-01-31 21:00:59,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8428 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=10279, Invalid=21583, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 21:00:59,733 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 443 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 777 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 777 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:00:59,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 50 Invalid, 1143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [777 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:00:59,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-01-31 21:00:59,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 132. [2022-01-31 21:00:59,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:59,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2022-01-31 21:00:59,780 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 129 [2022-01-31 21:00:59,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:00:59,780 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2022-01-31 21:00:59,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 61 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:59,780 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2022-01-31 21:00:59,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-31 21:00:59,781 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:00:59,781 INFO L514 BasicCegarLoop]: trace histogram [57, 56, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:00:59,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 21:00:59,781 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:00:59,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:00:59,781 INFO L85 PathProgramCache]: Analyzing trace with hash 71247270, now seen corresponding path program 56 times [2022-01-31 21:00:59,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:00:59,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806351797] [2022-01-31 21:00:59,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:00:59,830 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:00:59,830 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:00:59,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:00:59,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:00,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:00,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:01,078 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:01,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806351797] [2022-01-31 21:01:01,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [806351797] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:01,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:01,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 21:01:01,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562308223] [2022-01-31 21:01:01,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:01,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 21:01:01,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:01,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 21:01:01,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1778, Invalid=2254, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 21:01:01,080 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand has 64 states, 64 states have (on average 1.984375) internal successors, (127), 62 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:07,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:07,030 INFO L93 Difference]: Finished difference Result 308 states and 365 transitions. [2022-01-31 21:01:07,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 21:01:07,030 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.984375) internal successors, (127), 62 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-01-31 21:01:07,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:07,031 INFO L225 Difference]: With dead ends: 308 [2022-01-31 21:01:07,031 INFO L226 Difference]: Without dead ends: 302 [2022-01-31 21:01:07,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8721 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=10633, Invalid=22309, Unknown=0, NotChecked=0, Total=32942 [2022-01-31 21:01:07,033 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 515 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 949 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 949 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:07,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 40 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [949 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:01:07,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-01-31 21:01:07,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 134. [2022-01-31 21:01:07,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 129 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:07,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2022-01-31 21:01:07,078 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 131 [2022-01-31 21:01:07,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:07,078 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2022-01-31 21:01:07,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.984375) internal successors, (127), 62 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:07,078 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2022-01-31 21:01:07,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-31 21:01:07,079 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:07,079 INFO L514 BasicCegarLoop]: trace histogram [58, 57, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:07,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 21:01:07,079 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:07,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:07,079 INFO L85 PathProgramCache]: Analyzing trace with hash -609346079, now seen corresponding path program 57 times [2022-01-31 21:01:07,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:07,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977490530] [2022-01-31 21:01:07,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:07,143 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:07,144 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:01:07,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:07,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:08,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:08,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:08,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:08,213 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:08,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977490530] [2022-01-31 21:01:08,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1977490530] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:08,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:08,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 21:01:08,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115656855] [2022-01-31 21:01:08,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:08,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 21:01:08,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:08,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 21:01:08,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1838, Invalid=2322, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:01:08,215 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 63 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:14,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:14,484 INFO L93 Difference]: Finished difference Result 313 states and 371 transitions. [2022-01-31 21:01:14,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 21:01:14,485 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 63 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 133 [2022-01-31 21:01:14,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:14,486 INFO L225 Difference]: With dead ends: 313 [2022-01-31 21:01:14,486 INFO L226 Difference]: Without dead ends: 307 [2022-01-31 21:01:14,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9019 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=10993, Invalid=23047, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 21:01:14,491 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 686 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 1015 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1015 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:14,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [686 Valid, 40 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1015 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:01:14,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-01-31 21:01:14,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 136. [2022-01-31 21:01:14,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.015267175572519) internal successors, (133), 131 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:14,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2022-01-31 21:01:14,539 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 133 [2022-01-31 21:01:14,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:14,539 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2022-01-31 21:01:14,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 63 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:14,540 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2022-01-31 21:01:14,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-31 21:01:14,540 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:14,540 INFO L514 BasicCegarLoop]: trace histogram [59, 58, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:14,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 21:01:14,540 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:14,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:14,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1824525476, now seen corresponding path program 58 times [2022-01-31 21:01:14,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:14,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087963187] [2022-01-31 21:01:14,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:14,591 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:14,591 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:01:14,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:14,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:15,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:15,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:15,906 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:15,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087963187] [2022-01-31 21:01:15,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1087963187] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:15,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:15,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 21:01:15,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295220838] [2022-01-31 21:01:15,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:15,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 21:01:15,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:15,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 21:01:15,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1899, Invalid=2391, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 21:01:15,908 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 66 states, 66 states have (on average 1.9848484848484849) internal successors, (131), 64 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:22,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:22,252 INFO L93 Difference]: Finished difference Result 318 states and 377 transitions. [2022-01-31 21:01:22,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 21:01:22,253 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.9848484848484849) internal successors, (131), 64 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2022-01-31 21:01:22,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:22,254 INFO L225 Difference]: With dead ends: 318 [2022-01-31 21:01:22,254 INFO L226 Difference]: Without dead ends: 312 [2022-01-31 21:01:22,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9322 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=11359, Invalid=23797, Unknown=0, NotChecked=0, Total=35156 [2022-01-31 21:01:22,256 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 454 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 693 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 693 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:22,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 65 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [693 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:01:22,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-01-31 21:01:22,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 138. [2022-01-31 21:01:22,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 133 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:22,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2022-01-31 21:01:22,307 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 135 [2022-01-31 21:01:22,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:22,307 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2022-01-31 21:01:22,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.9848484848484849) internal successors, (131), 64 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:22,307 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2022-01-31 21:01:22,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-31 21:01:22,307 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:22,307 INFO L514 BasicCegarLoop]: trace histogram [60, 59, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:22,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 21:01:22,308 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:22,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:22,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1380821481, now seen corresponding path program 59 times [2022-01-31 21:01:22,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:22,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937480187] [2022-01-31 21:01:22,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:22,365 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:22,365 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:01:22,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:22,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:23,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:23,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:23,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:23,438 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:23,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937480187] [2022-01-31 21:01:23,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1937480187] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:23,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:23,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 21:01:23,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624255568] [2022-01-31 21:01:23,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:23,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 21:01:23,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:23,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 21:01:23,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=2461, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:01:23,440 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand has 67 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 65 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:30,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:30,340 INFO L93 Difference]: Finished difference Result 323 states and 383 transitions. [2022-01-31 21:01:30,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-31 21:01:30,341 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 65 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2022-01-31 21:01:30,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:30,342 INFO L225 Difference]: With dead ends: 323 [2022-01-31 21:01:30,342 INFO L226 Difference]: Without dead ends: 317 [2022-01-31 21:01:30,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9630 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=11731, Invalid=24559, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 21:01:30,343 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 572 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 1168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1168 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:30,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [572 Valid, 45 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1168 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:01:30,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-01-31 21:01:30,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 140. [2022-01-31 21:01:30,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 135 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:30,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2022-01-31 21:01:30,395 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 137 [2022-01-31 21:01:30,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:30,396 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2022-01-31 21:01:30,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 65 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:30,396 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2022-01-31 21:01:30,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-01-31 21:01:30,396 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:30,396 INFO L514 BasicCegarLoop]: trace histogram [61, 60, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:30,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 21:01:30,397 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:30,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:30,397 INFO L85 PathProgramCache]: Analyzing trace with hash -183044590, now seen corresponding path program 60 times [2022-01-31 21:01:30,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:30,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288805802] [2022-01-31 21:01:30,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:30,453 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:30,453 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:01:30,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:30,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:31,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:31,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:31,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:31,605 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:31,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288805802] [2022-01-31 21:01:31,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1288805802] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:31,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:31,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 21:01:31,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529445930] [2022-01-31 21:01:31,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:31,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 21:01:31,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:31,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 21:01:31,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2024, Invalid=2532, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 21:01:31,608 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand has 68 states, 68 states have (on average 1.9852941176470589) internal successors, (135), 66 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:38,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:38,546 INFO L93 Difference]: Finished difference Result 328 states and 389 transitions. [2022-01-31 21:01:38,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-31 21:01:38,546 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.9852941176470589) internal successors, (135), 66 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-01-31 21:01:38,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:38,547 INFO L225 Difference]: With dead ends: 328 [2022-01-31 21:01:38,547 INFO L226 Difference]: Without dead ends: 322 [2022-01-31 21:01:38,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9943 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=12109, Invalid=25333, Unknown=0, NotChecked=0, Total=37442 [2022-01-31 21:01:38,549 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 497 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 877 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 877 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:38,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 65 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [877 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:01:38,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-01-31 21:01:38,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 142. [2022-01-31 21:01:38,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0145985401459854) internal successors, (139), 137 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:38,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2022-01-31 21:01:38,601 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 139 [2022-01-31 21:01:38,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:38,601 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2022-01-31 21:01:38,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.9852941176470589) internal successors, (135), 66 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:38,602 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2022-01-31 21:01:38,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-31 21:01:38,603 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:38,603 INFO L514 BasicCegarLoop]: trace histogram [62, 61, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:38,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 21:01:38,603 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:38,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:38,604 INFO L85 PathProgramCache]: Analyzing trace with hash -170687667, now seen corresponding path program 61 times [2022-01-31 21:01:38,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:38,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696868486] [2022-01-31 21:01:38,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:38,690 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:38,690 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:01:38,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:40,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:40,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:40,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:40,141 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:40,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696868486] [2022-01-31 21:01:40,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [696868486] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:40,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:40,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 21:01:40,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986910270] [2022-01-31 21:01:40,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:40,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 21:01:40,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:40,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 21:01:40,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2088, Invalid=2604, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:01:40,143 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 67 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:47,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:47,110 INFO L93 Difference]: Finished difference Result 333 states and 395 transitions. [2022-01-31 21:01:47,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-31 21:01:47,111 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 67 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2022-01-31 21:01:47,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:47,112 INFO L225 Difference]: With dead ends: 333 [2022-01-31 21:01:47,112 INFO L226 Difference]: Without dead ends: 327 [2022-01-31 21:01:47,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10261 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=12493, Invalid=26119, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 21:01:47,114 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 533 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 1093 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1093 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:47,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 55 Invalid, 1492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1093 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:01:47,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-01-31 21:01:47,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 144. [2022-01-31 21:01:47,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.014388489208633) internal successors, (141), 139 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:47,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2022-01-31 21:01:47,191 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 141 [2022-01-31 21:01:47,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:47,192 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2022-01-31 21:01:47,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 67 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:47,192 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2022-01-31 21:01:47,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-01-31 21:01:47,192 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:47,192 INFO L514 BasicCegarLoop]: trace histogram [63, 62, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:47,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 21:01:47,193 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:47,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:47,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1180586552, now seen corresponding path program 62 times [2022-01-31 21:01:47,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:47,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008921910] [2022-01-31 21:01:47,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:47,289 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:47,290 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:01:47,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:47,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:48,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:48,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:48,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:48,499 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:48,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008921910] [2022-01-31 21:01:48,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2008921910] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:48,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:48,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 21:01:48,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819125790] [2022-01-31 21:01:48,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:48,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 21:01:48,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:48,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 21:01:48,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2153, Invalid=2677, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 21:01:48,501 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 68 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:55,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:55,569 INFO L93 Difference]: Finished difference Result 338 states and 401 transitions. [2022-01-31 21:01:55,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-31 21:01:55,569 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 68 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-01-31 21:01:55,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:55,570 INFO L225 Difference]: With dead ends: 338 [2022-01-31 21:01:55,570 INFO L226 Difference]: Without dead ends: 332 [2022-01-31 21:01:55,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10584 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=12883, Invalid=26917, Unknown=0, NotChecked=0, Total=39800 [2022-01-31 21:01:55,572 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 516 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 807 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 807 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:55,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 55 Invalid, 1209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [807 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:01:55,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-01-31 21:01:55,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 146. [2022-01-31 21:01:55,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 141 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:55,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 147 transitions. [2022-01-31 21:01:55,627 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 147 transitions. Word has length 143 [2022-01-31 21:01:55,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:55,627 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 147 transitions. [2022-01-31 21:01:55,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 68 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:55,627 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 147 transitions. [2022-01-31 21:01:55,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-31 21:01:55,627 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:55,628 INFO L514 BasicCegarLoop]: trace histogram [64, 63, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:55,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 21:01:55,628 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:55,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:55,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1030806141, now seen corresponding path program 63 times [2022-01-31 21:01:55,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:55,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537503991] [2022-01-31 21:01:55,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:55,717 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:01:55,717 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:01:55,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:55,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:56,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:56,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:56,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:57,021 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:57,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537503991] [2022-01-31 21:01:57,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [537503991] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:57,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:57,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 21:01:57,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461706913] [2022-01-31 21:01:57,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:57,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 21:01:57,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:57,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 21:01:57,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2219, Invalid=2751, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:01:57,023 INFO L87 Difference]: Start difference. First operand 146 states and 147 transitions. Second operand has 71 states, 71 states have (on average 1.9859154929577465) internal successors, (141), 69 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:02:05,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:02:05,310 INFO L93 Difference]: Finished difference Result 343 states and 407 transitions. [2022-01-31 21:02:05,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-01-31 21:02:05,310 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.9859154929577465) internal successors, (141), 69 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2022-01-31 21:02:05,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:02:05,311 INFO L225 Difference]: With dead ends: 343 [2022-01-31 21:02:05,311 INFO L226 Difference]: Without dead ends: 337 [2022-01-31 21:02:05,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10912 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=13279, Invalid=27727, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 21:02:05,313 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 620 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 1221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1221 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:02:05,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [620 Valid, 55 Invalid, 1624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1221 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:02:05,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-01-31 21:02:05,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 148. [2022-01-31 21:02:05,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.013986013986014) internal successors, (145), 143 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:02:05,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2022-01-31 21:02:05,405 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 145 [2022-01-31 21:02:05,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:02:05,406 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2022-01-31 21:02:05,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.9859154929577465) internal successors, (141), 69 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:02:05,406 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2022-01-31 21:02:05,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-31 21:02:05,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:02:05,406 INFO L514 BasicCegarLoop]: trace histogram [65, 64, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:02:05,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 21:02:05,411 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:02:05,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:02:05,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1174248062, now seen corresponding path program 64 times [2022-01-31 21:02:05,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:02:05,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796650103] [2022-01-31 21:02:05,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:02:05,484 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:05,485 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:02:05,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:02:05,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:06,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:06,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:06,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:02:06,883 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:06,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796650103] [2022-01-31 21:02:06,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [796650103] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:06,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:06,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 21:02:06,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254906579] [2022-01-31 21:02:06,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:06,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 21:02:06,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:06,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 21:02:06,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2286, Invalid=2826, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 21:02:06,895 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 72 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 70 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:02:15,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:02:15,496 INFO L93 Difference]: Finished difference Result 348 states and 413 transitions. [2022-01-31 21:02:15,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-31 21:02:15,497 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 70 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2022-01-31 21:02:15,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:02:15,505 INFO L225 Difference]: With dead ends: 348 [2022-01-31 21:02:15,505 INFO L226 Difference]: Without dead ends: 342 [2022-01-31 21:02:15,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11245 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=13681, Invalid=28549, Unknown=0, NotChecked=0, Total=42230 [2022-01-31 21:02:15,508 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 583 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 874 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 874 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:02:15,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [583 Valid, 60 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [874 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:02:15,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-01-31 21:02:15,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 150. [2022-01-31 21:02:15,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.013793103448276) internal successors, (147), 145 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:02:15,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2022-01-31 21:02:15,579 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 147 [2022-01-31 21:02:15,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:02:15,579 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2022-01-31 21:02:15,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 70 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:02:15,579 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2022-01-31 21:02:15,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-01-31 21:02:15,596 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:02:15,596 INFO L514 BasicCegarLoop]: trace histogram [66, 65, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:02:15,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 21:02:15,596 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:02:15,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:02:15,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1482507079, now seen corresponding path program 65 times [2022-01-31 21:02:15,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:02:15,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559595840] [2022-01-31 21:02:15,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:02:15,660 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:15,660 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:02:15,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:02:15,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:17,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:17,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:17,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:02:17,540 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:17,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559595840] [2022-01-31 21:02:17,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1559595840] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:17,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:17,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 21:02:17,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114397714] [2022-01-31 21:02:17,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:17,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 21:02:17,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:17,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 21:02:17,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2354, Invalid=2902, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:02:17,543 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 71 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:02:26,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:02:26,124 INFO L93 Difference]: Finished difference Result 353 states and 419 transitions. [2022-01-31 21:02:26,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-01-31 21:02:26,124 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 71 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2022-01-31 21:02:26,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:02:26,126 INFO L225 Difference]: With dead ends: 353 [2022-01-31 21:02:26,127 INFO L226 Difference]: Without dead ends: 347 [2022-01-31 21:02:26,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11583 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=14089, Invalid=29383, Unknown=0, NotChecked=0, Total=43472 [2022-01-31 21:02:26,129 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 600 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 1023 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1023 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:02:26,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 55 Invalid, 1436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1023 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:02:26,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-01-31 21:02:26,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 152. [2022-01-31 21:02:26,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 147 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:02:26,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2022-01-31 21:02:26,189 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 149 [2022-01-31 21:02:26,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:02:26,189 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2022-01-31 21:02:26,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 71 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:02:26,189 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2022-01-31 21:02:26,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-01-31 21:02:26,189 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:02:26,190 INFO L514 BasicCegarLoop]: trace histogram [67, 66, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:02:26,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 21:02:26,190 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:02:26,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:02:26,190 INFO L85 PathProgramCache]: Analyzing trace with hash 881343540, now seen corresponding path program 66 times [2022-01-31 21:02:26,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:02:26,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530447578] [2022-01-31 21:02:26,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:02:26,244 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:26,244 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:02:26,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:02:26,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:27,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:27,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:27,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:02:27,914 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:27,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530447578] [2022-01-31 21:02:27,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1530447578] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:27,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:27,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 21:02:27,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847287611] [2022-01-31 21:02:27,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:27,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 21:02:27,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:27,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 21:02:27,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2423, Invalid=2979, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 21:02:27,916 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand has 74 states, 74 states have (on average 1.9864864864864864) internal successors, (147), 72 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:02:37,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:02:37,579 INFO L93 Difference]: Finished difference Result 358 states and 425 transitions. [2022-01-31 21:02:37,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-01-31 21:02:37,579 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.9864864864864864) internal successors, (147), 72 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2022-01-31 21:02:37,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:02:37,580 INFO L225 Difference]: With dead ends: 358 [2022-01-31 21:02:37,580 INFO L226 Difference]: Without dead ends: 352 [2022-01-31 21:02:37,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11926 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=14503, Invalid=30229, Unknown=0, NotChecked=0, Total=44732 [2022-01-31 21:02:37,599 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 568 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 983 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 983 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:02:37,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [568 Valid, 70 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [983 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:02:37,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-01-31 21:02:37,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 154. [2022-01-31 21:02:37,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.0134228187919463) internal successors, (151), 149 states have internal predecessors, (151), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:02:37,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2022-01-31 21:02:37,719 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 151 [2022-01-31 21:02:37,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:02:37,719 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2022-01-31 21:02:37,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.9864864864864864) internal successors, (147), 72 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:02:37,720 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2022-01-31 21:02:37,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-01-31 21:02:37,720 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:02:37,720 INFO L514 BasicCegarLoop]: trace histogram [68, 67, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:02:37,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 21:02:37,720 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:02:37,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:02:37,721 INFO L85 PathProgramCache]: Analyzing trace with hash 504088815, now seen corresponding path program 67 times [2022-01-31 21:02:37,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:02:37,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965135761] [2022-01-31 21:02:37,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:02:37,801 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:37,802 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:02:37,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:02:37,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:39,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:39,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:39,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:02:39,599 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:39,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965135761] [2022-01-31 21:02:39,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [965135761] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:39,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:39,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 21:02:39,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412053999] [2022-01-31 21:02:39,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:39,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 21:02:39,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:39,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 21:02:39,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2493, Invalid=3057, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:02:39,602 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand has 75 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 73 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:02:48,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:02:48,400 INFO L93 Difference]: Finished difference Result 363 states and 431 transitions. [2022-01-31 21:02:48,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-01-31 21:02:48,401 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 73 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2022-01-31 21:02:48,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:02:48,402 INFO L225 Difference]: With dead ends: 363 [2022-01-31 21:02:48,402 INFO L226 Difference]: Without dead ends: 357 [2022-01-31 21:02:48,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12274 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=14923, Invalid=31087, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 21:02:48,404 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 590 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 1010 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1010 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:02:48,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [590 Valid, 45 Invalid, 1427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1010 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:02:48,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-01-31 21:02:48,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 156. [2022-01-31 21:02:48,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 151 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:02:48,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2022-01-31 21:02:48,464 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 153 [2022-01-31 21:02:48,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:02:48,464 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2022-01-31 21:02:48,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 73 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:02:48,464 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2022-01-31 21:02:48,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-31 21:02:48,465 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:02:48,465 INFO L514 BasicCegarLoop]: trace histogram [69, 68, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:02:48,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 21:02:48,465 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:02:48,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:02:48,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1260449046, now seen corresponding path program 68 times [2022-01-31 21:02:48,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:02:48,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158991783] [2022-01-31 21:02:48,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:02:48,516 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:48,516 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:02:48,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:02:48,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:49,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:49,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:02:49,571 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:49,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158991783] [2022-01-31 21:02:49,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1158991783] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:49,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:49,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 21:02:49,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171517977] [2022-01-31 21:02:49,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:49,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 21:02:49,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:49,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 21:02:49,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2564, Invalid=3136, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 21:02:49,573 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand has 76 states, 76 states have (on average 1.986842105263158) internal successors, (151), 74 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:02:58,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:02:58,290 INFO L93 Difference]: Finished difference Result 368 states and 437 transitions. [2022-01-31 21:02:58,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-01-31 21:02:58,291 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.986842105263158) internal successors, (151), 74 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-01-31 21:02:58,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:02:58,292 INFO L225 Difference]: With dead ends: 368 [2022-01-31 21:02:58,292 INFO L226 Difference]: Without dead ends: 362 [2022-01-31 21:02:58,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12627 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=15349, Invalid=31957, Unknown=0, NotChecked=0, Total=47306 [2022-01-31 21:02:58,294 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 640 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 1069 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1069 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:02:58,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [640 Valid, 75 Invalid, 1525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1069 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:02:58,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-01-31 21:02:58,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 158. [2022-01-31 21:02:58,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.0130718954248366) internal successors, (155), 153 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:02:58,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 159 transitions. [2022-01-31 21:02:58,359 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 159 transitions. Word has length 155 [2022-01-31 21:02:58,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:02:58,359 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 159 transitions. [2022-01-31 21:02:58,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.986842105263158) internal successors, (151), 74 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:02:58,359 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 159 transitions. [2022-01-31 21:02:58,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-31 21:02:58,360 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:02:58,360 INFO L514 BasicCegarLoop]: trace histogram [70, 69, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:02:58,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 21:02:58,360 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:02:58,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:02:58,360 INFO L85 PathProgramCache]: Analyzing trace with hash -469251547, now seen corresponding path program 69 times [2022-01-31 21:02:58,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:02:58,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211741855] [2022-01-31 21:02:58,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:02:58,396 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:02:58,397 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:02:58,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:02:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:59,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:59,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:02:59,680 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:59,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211741855] [2022-01-31 21:02:59,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1211741855] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:59,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:59,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 21:02:59,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324579558] [2022-01-31 21:02:59,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:59,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 21:02:59,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:59,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 21:02:59,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2636, Invalid=3216, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 21:02:59,683 INFO L87 Difference]: Start difference. First operand 158 states and 159 transitions. Second operand has 77 states, 77 states have (on average 1.9870129870129871) internal successors, (153), 75 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:08,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:08,318 INFO L93 Difference]: Finished difference Result 373 states and 443 transitions. [2022-01-31 21:03:08,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-01-31 21:03:08,318 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.9870129870129871) internal successors, (153), 75 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2022-01-31 21:03:08,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:08,319 INFO L225 Difference]: With dead ends: 373 [2022-01-31 21:03:08,319 INFO L226 Difference]: Without dead ends: 367 [2022-01-31 21:03:08,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12985 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=15781, Invalid=32839, Unknown=0, NotChecked=0, Total=48620 [2022-01-31 21:03:08,321 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 622 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 1053 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1053 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:08,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 60 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1053 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:03:08,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-01-31 21:03:08,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 160. [2022-01-31 21:03:08,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.0129032258064516) internal successors, (157), 155 states have internal predecessors, (157), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:08,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2022-01-31 21:03:08,424 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 157 [2022-01-31 21:03:08,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:08,424 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2022-01-31 21:03:08,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.9870129870129871) internal successors, (153), 75 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:08,424 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2022-01-31 21:03:08,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-31 21:03:08,424 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:08,424 INFO L514 BasicCegarLoop]: trace histogram [71, 70, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:08,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 21:03:08,425 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:08,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:08,425 INFO L85 PathProgramCache]: Analyzing trace with hash -337666400, now seen corresponding path program 70 times [2022-01-31 21:03:08,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:08,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969442358] [2022-01-31 21:03:08,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:08,466 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:08,467 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:03:08,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:08,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:09,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:09,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:09,883 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:09,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969442358] [2022-01-31 21:03:09,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [969442358] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:09,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:09,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 21:03:09,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334892310] [2022-01-31 21:03:09,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:09,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 21:03:09,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:09,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 21:03:09,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2709, Invalid=3297, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 21:03:09,885 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand has 78 states, 78 states have (on average 1.9871794871794872) internal successors, (155), 76 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:18,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:18,528 INFO L93 Difference]: Finished difference Result 378 states and 449 transitions. [2022-01-31 21:03:18,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-01-31 21:03:18,528 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.9871794871794872) internal successors, (155), 76 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2022-01-31 21:03:18,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:18,529 INFO L225 Difference]: With dead ends: 378 [2022-01-31 21:03:18,529 INFO L226 Difference]: Without dead ends: 372 [2022-01-31 21:03:18,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13348 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=16219, Invalid=33733, Unknown=0, NotChecked=0, Total=49952 [2022-01-31 21:03:18,531 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 553 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 1093 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1093 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:18,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 60 Invalid, 1540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1093 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:03:18,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-01-31 21:03:18,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 162. [2022-01-31 21:03:18,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.0127388535031847) internal successors, (159), 157 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:18,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2022-01-31 21:03:18,625 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 159 [2022-01-31 21:03:18,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:18,625 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2022-01-31 21:03:18,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.9871794871794872) internal successors, (155), 76 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:18,625 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2022-01-31 21:03:18,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-31 21:03:18,625 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:18,626 INFO L514 BasicCegarLoop]: trace histogram [72, 71, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:18,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 21:03:18,626 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:18,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:18,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1561608283, now seen corresponding path program 71 times [2022-01-31 21:03:18,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:18,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922602906] [2022-01-31 21:03:18,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:18,690 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:18,690 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:03:18,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:18,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:20,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:20,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:20,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:20,228 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:20,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922602906] [2022-01-31 21:03:20,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [922602906] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:20,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:20,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 21:03:20,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142593116] [2022-01-31 21:03:20,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:20,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 21:03:20,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:20,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 21:03:20,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2783, Invalid=3379, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 21:03:20,230 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand has 79 states, 79 states have (on average 1.9873417721518987) internal successors, (157), 77 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:30,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:30,203 INFO L93 Difference]: Finished difference Result 383 states and 455 transitions. [2022-01-31 21:03:30,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-01-31 21:03:30,203 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.9873417721518987) internal successors, (157), 77 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2022-01-31 21:03:30,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:30,204 INFO L225 Difference]: With dead ends: 383 [2022-01-31 21:03:30,204 INFO L226 Difference]: Without dead ends: 377 [2022-01-31 21:03:30,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13716 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=16663, Invalid=34639, Unknown=0, NotChecked=0, Total=51302 [2022-01-31 21:03:30,206 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 625 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 1002 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1002 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:30,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [625 Valid, 45 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1002 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:03:30,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-01-31 21:03:30,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 164. [2022-01-31 21:03:30,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.0125786163522013) internal successors, (161), 159 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:30,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2022-01-31 21:03:30,349 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 161 [2022-01-31 21:03:30,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:30,350 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2022-01-31 21:03:30,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.9873417721518987) internal successors, (157), 77 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:30,350 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2022-01-31 21:03:30,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-01-31 21:03:30,350 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:30,350 INFO L514 BasicCegarLoop]: trace histogram [73, 72, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:30,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 21:03:30,351 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:30,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:30,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1403477846, now seen corresponding path program 72 times [2022-01-31 21:03:30,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:30,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981217232] [2022-01-31 21:03:30,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:30,418 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:30,418 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:03:30,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:30,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:32,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:32,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:32,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:32,462 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:32,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981217232] [2022-01-31 21:03:32,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1981217232] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:32,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:32,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 21:03:32,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243720786] [2022-01-31 21:03:32,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:32,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 21:03:32,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:32,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 21:03:32,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2858, Invalid=3462, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 21:03:32,464 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand has 80 states, 80 states have (on average 1.9875) internal successors, (159), 78 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:42,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:42,340 INFO L93 Difference]: Finished difference Result 388 states and 461 transitions. [2022-01-31 21:03:42,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-01-31 21:03:42,341 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.9875) internal successors, (159), 78 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2022-01-31 21:03:42,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:42,342 INFO L225 Difference]: With dead ends: 388 [2022-01-31 21:03:42,342 INFO L226 Difference]: Without dead ends: 382 [2022-01-31 21:03:42,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14089 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=17113, Invalid=35557, Unknown=0, NotChecked=0, Total=52670 [2022-01-31 21:03:42,344 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 655 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 1077 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1077 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:42,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [655 Valid, 50 Invalid, 1520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1077 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:03:42,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-01-31 21:03:42,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 166. [2022-01-31 21:03:42,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.0124223602484472) internal successors, (163), 161 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:42,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2022-01-31 21:03:42,419 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 163 [2022-01-31 21:03:42,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:42,420 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2022-01-31 21:03:42,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.9875) internal successors, (159), 78 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:42,420 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2022-01-31 21:03:42,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-01-31 21:03:42,420 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:42,420 INFO L514 BasicCegarLoop]: trace histogram [74, 73, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:42,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 21:03:42,421 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:42,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:42,421 INFO L85 PathProgramCache]: Analyzing trace with hash -236016751, now seen corresponding path program 73 times [2022-01-31 21:03:42,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:42,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044606937] [2022-01-31 21:03:42,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:42,492 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:42,493 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:03:42,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:42,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:43,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:43,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:43,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:44,020 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:44,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044606937] [2022-01-31 21:03:44,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1044606937] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:44,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:44,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 21:03:44,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091374609] [2022-01-31 21:03:44,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:44,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 21:03:44,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:44,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 21:03:44,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2934, Invalid=3546, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 21:03:44,022 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand has 81 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 79 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:54,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:54,829 INFO L93 Difference]: Finished difference Result 393 states and 467 transitions. [2022-01-31 21:03:54,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-01-31 21:03:54,830 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 79 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2022-01-31 21:03:54,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:54,831 INFO L225 Difference]: With dead ends: 393 [2022-01-31 21:03:54,831 INFO L226 Difference]: Without dead ends: 387 [2022-01-31 21:03:54,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14467 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=17569, Invalid=36487, Unknown=0, NotChecked=0, Total=54056 [2022-01-31 21:03:54,833 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 682 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 1154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1154 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:54,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [682 Valid, 70 Invalid, 1628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1154 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:03:54,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-01-31 21:03:54,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 168. [2022-01-31 21:03:54,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.0122699386503067) internal successors, (165), 163 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:54,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2022-01-31 21:03:54,911 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 165 [2022-01-31 21:03:54,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:54,912 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2022-01-31 21:03:54,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 79 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:54,912 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2022-01-31 21:03:54,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-31 21:03:54,912 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:54,912 INFO L514 BasicCegarLoop]: trace histogram [75, 74, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:54,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 21:03:54,913 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:54,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:54,913 INFO L85 PathProgramCache]: Analyzing trace with hash 462673164, now seen corresponding path program 74 times [2022-01-31 21:03:54,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:54,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887410910] [2022-01-31 21:03:54,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:54,997 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:54,997 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:03:54,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:55,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:56,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:56,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:56,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:57,040 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:57,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887410910] [2022-01-31 21:03:57,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1887410910] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:57,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:57,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 21:03:57,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729461567] [2022-01-31 21:03:57,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:57,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 21:03:57,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:57,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 21:03:57,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3011, Invalid=3631, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 21:03:57,042 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand has 82 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 80 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:07,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:07,649 INFO L93 Difference]: Finished difference Result 398 states and 473 transitions. [2022-01-31 21:04:07,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2022-01-31 21:04:07,649 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 80 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-01-31 21:04:07,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:07,651 INFO L225 Difference]: With dead ends: 398 [2022-01-31 21:04:07,651 INFO L226 Difference]: Without dead ends: 392 [2022-01-31 21:04:07,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14850 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=18031, Invalid=37429, Unknown=0, NotChecked=0, Total=55460 [2022-01-31 21:04:07,653 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 723 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 1294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1294 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:07,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [723 Valid, 45 Invalid, 1742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1294 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:04:07,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-01-31 21:04:07,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 170. [2022-01-31 21:04:07,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.0121212121212122) internal successors, (167), 165 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:07,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 171 transitions. [2022-01-31 21:04:07,732 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 171 transitions. Word has length 167 [2022-01-31 21:04:07,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:07,732 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 171 transitions. [2022-01-31 21:04:07,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 80 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:07,732 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 171 transitions. [2022-01-31 21:04:07,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-01-31 21:04:07,733 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:07,733 INFO L514 BasicCegarLoop]: trace histogram [76, 75, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:07,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 21:04:07,733 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:07,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:07,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1888783303, now seen corresponding path program 75 times [2022-01-31 21:04:07,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:07,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434867527] [2022-01-31 21:04:07,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:07,775 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:07,775 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:04:07,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:07,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:08,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:08,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:08,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:09,040 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:09,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434867527] [2022-01-31 21:04:09,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [434867527] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:09,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:09,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 21:04:09,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056659995] [2022-01-31 21:04:09,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:09,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 21:04:09,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:09,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 21:04:09,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3089, Invalid=3717, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 21:04:09,042 INFO L87 Difference]: Start difference. First operand 170 states and 171 transitions. Second operand has 83 states, 83 states have (on average 1.9879518072289157) internal successors, (165), 81 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:20,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:20,835 INFO L93 Difference]: Finished difference Result 403 states and 479 transitions. [2022-01-31 21:04:20,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-01-31 21:04:20,836 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.9879518072289157) internal successors, (165), 81 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 169 [2022-01-31 21:04:20,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:20,837 INFO L225 Difference]: With dead ends: 403 [2022-01-31 21:04:20,837 INFO L226 Difference]: Without dead ends: 397 [2022-01-31 21:04:20,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15238 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=18499, Invalid=38383, Unknown=0, NotChecked=0, Total=56882 [2022-01-31 21:04:20,839 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 627 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 1071 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1071 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:20,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [627 Valid, 65 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1071 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:04:20,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-01-31 21:04:20,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 172. [2022-01-31 21:04:20,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.0119760479041917) internal successors, (169), 167 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:20,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2022-01-31 21:04:20,934 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 169 [2022-01-31 21:04:20,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:20,934 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2022-01-31 21:04:20,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.9879518072289157) internal successors, (165), 81 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:20,934 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2022-01-31 21:04:20,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-01-31 21:04:20,935 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:20,935 INFO L514 BasicCegarLoop]: trace histogram [77, 76, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:20,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 21:04:20,935 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:20,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:20,935 INFO L85 PathProgramCache]: Analyzing trace with hash -2008907838, now seen corresponding path program 76 times [2022-01-31 21:04:20,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:20,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962489753] [2022-01-31 21:04:20,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:20,999 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:21,000 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:04:21,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:21,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:22,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:22,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:22,893 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:22,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962489753] [2022-01-31 21:04:22,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1962489753] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:22,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:22,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 21:04:22,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127569746] [2022-01-31 21:04:22,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:22,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 21:04:22,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:22,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 21:04:22,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3168, Invalid=3804, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 21:04:22,895 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand has 84 states, 84 states have (on average 1.9880952380952381) internal successors, (167), 82 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:34,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:34,756 INFO L93 Difference]: Finished difference Result 408 states and 485 transitions. [2022-01-31 21:04:34,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2022-01-31 21:04:34,756 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.9880952380952381) internal successors, (167), 82 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2022-01-31 21:04:34,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:34,757 INFO L225 Difference]: With dead ends: 408 [2022-01-31 21:04:34,757 INFO L226 Difference]: Without dead ends: 402 [2022-01-31 21:04:34,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15631 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=18973, Invalid=39349, Unknown=0, NotChecked=0, Total=58322 [2022-01-31 21:04:34,759 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 631 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 1208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1208 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:34,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [631 Valid, 65 Invalid, 1688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1208 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:04:34,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-01-31 21:04:34,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 174. [2022-01-31 21:04:34,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.0118343195266273) internal successors, (171), 169 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:34,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2022-01-31 21:04:34,841 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 171 [2022-01-31 21:04:34,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:34,842 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2022-01-31 21:04:34,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.9880952380952381) internal successors, (167), 82 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:34,842 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2022-01-31 21:04:34,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-01-31 21:04:34,842 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:34,842 INFO L514 BasicCegarLoop]: trace histogram [78, 77, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:34,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 21:04:34,843 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:34,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:34,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1816355069, now seen corresponding path program 77 times [2022-01-31 21:04:34,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:34,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373764528] [2022-01-31 21:04:34,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:34,895 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:34,895 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:04:34,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:34,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:36,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:36,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:36,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:36,951 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:36,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373764528] [2022-01-31 21:04:36,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1373764528] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:36,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:36,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 21:04:36,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018546430] [2022-01-31 21:04:36,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:36,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 21:04:36,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:36,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 21:04:36,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3248, Invalid=3892, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 21:04:36,953 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand has 85 states, 85 states have (on average 1.988235294117647) internal successors, (169), 83 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:48,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:48,713 INFO L93 Difference]: Finished difference Result 413 states and 491 transitions. [2022-01-31 21:04:48,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2022-01-31 21:04:48,714 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.988235294117647) internal successors, (169), 83 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2022-01-31 21:04:48,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:48,715 INFO L225 Difference]: With dead ends: 413 [2022-01-31 21:04:48,715 INFO L226 Difference]: Without dead ends: 407 [2022-01-31 21:04:48,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16029 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=19453, Invalid=40327, Unknown=0, NotChecked=0, Total=59780 [2022-01-31 21:04:48,717 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 891 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 1591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 2076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1591 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:48,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [891 Valid, 65 Invalid, 2076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1591 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:04:48,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-01-31 21:04:48,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 176. [2022-01-31 21:04:48,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.0116959064327486) internal successors, (173), 171 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:48,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2022-01-31 21:04:48,801 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 173 [2022-01-31 21:04:48,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:48,802 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2022-01-31 21:04:48,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.988235294117647) internal successors, (169), 83 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:48,802 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2022-01-31 21:04:48,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-01-31 21:04:48,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:48,802 INFO L514 BasicCegarLoop]: trace histogram [79, 78, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:48,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 21:04:48,803 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:48,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:48,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1402003320, now seen corresponding path program 78 times [2022-01-31 21:04:48,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:48,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394903569] [2022-01-31 21:04:48,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:48,863 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:48,863 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:04:48,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:48,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:50,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:50,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:50,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:50,523 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:50,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394903569] [2022-01-31 21:04:50,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1394903569] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:50,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:50,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 21:04:50,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028807250] [2022-01-31 21:04:50,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:50,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 21:04:50,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:50,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 21:04:50,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3329, Invalid=3981, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 21:04:50,526 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand has 86 states, 86 states have (on average 1.9883720930232558) internal successors, (171), 84 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:03,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:03,036 INFO L93 Difference]: Finished difference Result 418 states and 497 transitions. [2022-01-31 21:05:03,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2022-01-31 21:05:03,036 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.9883720930232558) internal successors, (171), 84 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2022-01-31 21:05:03,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:03,037 INFO L225 Difference]: With dead ends: 418 [2022-01-31 21:05:03,037 INFO L226 Difference]: Without dead ends: 412 [2022-01-31 21:05:03,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16432 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=19939, Invalid=41317, Unknown=0, NotChecked=0, Total=61256 [2022-01-31 21:05:03,040 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 593 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 1053 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1053 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:03,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [593 Valid, 65 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1053 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:05:03,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-01-31 21:05:03,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 178. [2022-01-31 21:05:03,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 173 states have (on average 1.0115606936416186) internal successors, (175), 173 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:03,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 179 transitions. [2022-01-31 21:05:03,127 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 179 transitions. Word has length 175 [2022-01-31 21:05:03,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:03,127 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 179 transitions. [2022-01-31 21:05:03,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.9883720930232558) internal successors, (171), 84 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:03,127 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 179 transitions. [2022-01-31 21:05:03,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-01-31 21:05:03,128 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:03,128 INFO L514 BasicCegarLoop]: trace histogram [80, 79, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:03,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 21:05:03,128 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:03,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:03,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1653036237, now seen corresponding path program 79 times [2022-01-31 21:05:03,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:03,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708629913] [2022-01-31 21:05:03,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:03,178 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:03,178 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:05:03,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:03,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:04,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:05,105 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:05,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708629913] [2022-01-31 21:05:05,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [708629913] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:05,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:05,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 21:05:05,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375783772] [2022-01-31 21:05:05,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:05,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 21:05:05,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:05,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 21:05:05,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3411, Invalid=4071, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 21:05:05,108 INFO L87 Difference]: Start difference. First operand 178 states and 179 transitions. Second operand has 87 states, 87 states have (on average 1.9885057471264367) internal successors, (173), 85 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:17,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:17,942 INFO L93 Difference]: Finished difference Result 423 states and 503 transitions. [2022-01-31 21:05:17,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2022-01-31 21:05:17,942 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.9885057471264367) internal successors, (173), 85 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 177 [2022-01-31 21:05:17,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:17,943 INFO L225 Difference]: With dead ends: 423 [2022-01-31 21:05:17,943 INFO L226 Difference]: Without dead ends: 417 [2022-01-31 21:05:17,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16840 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=20431, Invalid=42319, Unknown=0, NotChecked=0, Total=62750 [2022-01-31 21:05:17,946 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 702 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 1360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1360 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:17,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [702 Valid, 50 Invalid, 1836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1360 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:05:17,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-01-31 21:05:18,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 180. [2022-01-31 21:05:18,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.0114285714285713) internal successors, (177), 175 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:18,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2022-01-31 21:05:18,034 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 177 [2022-01-31 21:05:18,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:18,034 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2022-01-31 21:05:18,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.9885057471264367) internal successors, (173), 85 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:18,035 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2022-01-31 21:05:18,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-01-31 21:05:18,035 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:18,035 INFO L514 BasicCegarLoop]: trace histogram [81, 80, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:18,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 21:05:18,035 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:18,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:18,035 INFO L85 PathProgramCache]: Analyzing trace with hash 211579950, now seen corresponding path program 80 times [2022-01-31 21:05:18,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:18,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304164413] [2022-01-31 21:05:18,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:18,084 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:18,084 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:05:18,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:18,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:20,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:20,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:20,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:20,194 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:20,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304164413] [2022-01-31 21:05:20,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1304164413] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:20,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:20,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 21:05:20,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970827392] [2022-01-31 21:05:20,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:20,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 21:05:20,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:20,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 21:05:20,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3494, Invalid=4162, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 21:05:20,197 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand has 88 states, 88 states have (on average 1.9886363636363635) internal successors, (175), 86 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:33,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:33,900 INFO L93 Difference]: Finished difference Result 428 states and 509 transitions. [2022-01-31 21:05:33,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2022-01-31 21:05:33,900 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.9886363636363635) internal successors, (175), 86 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-01-31 21:05:33,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:33,901 INFO L225 Difference]: With dead ends: 428 [2022-01-31 21:05:33,902 INFO L226 Difference]: Without dead ends: 422 [2022-01-31 21:05:33,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17253 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=20929, Invalid=43333, Unknown=0, NotChecked=0, Total=64262 [2022-01-31 21:05:33,904 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 738 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 1282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1282 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:33,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [738 Valid, 65 Invalid, 1784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1282 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:05:33,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-01-31 21:05:34,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 182. [2022-01-31 21:05:34,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.0112994350282485) internal successors, (179), 177 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:34,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 183 transitions. [2022-01-31 21:05:34,003 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 183 transitions. Word has length 179 [2022-01-31 21:05:34,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:34,003 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 183 transitions. [2022-01-31 21:05:34,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.9886363636363635) internal successors, (175), 86 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:34,004 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 183 transitions. [2022-01-31 21:05:34,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-01-31 21:05:34,004 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:34,011 INFO L514 BasicCegarLoop]: trace histogram [82, 81, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:34,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 21:05:34,011 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:34,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:34,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1106373225, now seen corresponding path program 81 times [2022-01-31 21:05:34,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:34,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709024018] [2022-01-31 21:05:34,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:34,062 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:34,062 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:05:34,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:34,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:36,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:36,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:36,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:36,569 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:36,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709024018] [2022-01-31 21:05:36,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1709024018] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:36,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:36,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 21:05:36,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114016435] [2022-01-31 21:05:36,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:36,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 21:05:36,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:36,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 21:05:36,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3578, Invalid=4254, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 21:05:36,572 INFO L87 Difference]: Start difference. First operand 182 states and 183 transitions. Second operand has 89 states, 89 states have (on average 1.9887640449438202) internal successors, (177), 87 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:50,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:50,526 INFO L93 Difference]: Finished difference Result 433 states and 515 transitions. [2022-01-31 21:05:50,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2022-01-31 21:05:50,526 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.9887640449438202) internal successors, (177), 87 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 181 [2022-01-31 21:05:50,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:50,527 INFO L225 Difference]: With dead ends: 433 [2022-01-31 21:05:50,527 INFO L226 Difference]: Without dead ends: 427 [2022-01-31 21:05:50,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17671 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=21433, Invalid=44359, Unknown=0, NotChecked=0, Total=65792 [2022-01-31 21:05:50,530 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 751 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 1212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1212 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:50,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [751 Valid, 55 Invalid, 1703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1212 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:05:50,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-01-31 21:05:50,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 184. [2022-01-31 21:05:50,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.011173184357542) internal successors, (181), 179 states have internal predecessors, (181), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:50,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2022-01-31 21:05:50,632 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 181 [2022-01-31 21:05:50,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:50,632 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2022-01-31 21:05:50,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.9887640449438202) internal successors, (177), 87 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:50,633 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2022-01-31 21:05:50,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-01-31 21:05:50,633 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:50,633 INFO L514 BasicCegarLoop]: trace histogram [83, 82, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:50,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 21:05:50,634 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:50,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:50,635 INFO L85 PathProgramCache]: Analyzing trace with hash 2009251300, now seen corresponding path program 82 times [2022-01-31 21:05:50,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:50,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549220170] [2022-01-31 21:05:50,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:50,720 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:50,721 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:05:50,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:50,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:52,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:52,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:52,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:52,571 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:52,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549220170] [2022-01-31 21:05:52,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1549220170] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:52,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:52,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 21:05:52,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775353125] [2022-01-31 21:05:52,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:52,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 21:05:52,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:52,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 21:05:52,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3663, Invalid=4347, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 21:05:52,574 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 88 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:07,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:06:07,074 INFO L93 Difference]: Finished difference Result 438 states and 521 transitions. [2022-01-31 21:06:07,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2022-01-31 21:06:07,075 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 88 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2022-01-31 21:06:07,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:06:07,076 INFO L225 Difference]: With dead ends: 438 [2022-01-31 21:06:07,076 INFO L226 Difference]: Without dead ends: 432 [2022-01-31 21:06:07,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18094 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=21943, Invalid=45397, Unknown=0, NotChecked=0, Total=67340 [2022-01-31 21:06:07,078 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 809 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 1365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1365 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:06:07,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [809 Valid, 50 Invalid, 1856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1365 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:06:07,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-01-31 21:06:07,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 186. [2022-01-31 21:06:07,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 181 states have (on average 1.011049723756906) internal successors, (183), 181 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:07,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 187 transitions. [2022-01-31 21:06:07,188 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 187 transitions. Word has length 183 [2022-01-31 21:06:07,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:06:07,188 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 187 transitions. [2022-01-31 21:06:07,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 88 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:07,188 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 187 transitions. [2022-01-31 21:06:07,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-01-31 21:06:07,189 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:06:07,189 INFO L514 BasicCegarLoop]: trace histogram [84, 83, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:06:07,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 21:06:07,189 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:06:07,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:06:07,189 INFO L85 PathProgramCache]: Analyzing trace with hash 2091687583, now seen corresponding path program 83 times [2022-01-31 21:06:07,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:06:07,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77148830] [2022-01-31 21:06:07,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:06:07,251 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:07,252 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:06:07,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:06:07,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:08,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:06:08,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:08,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:06:09,067 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:06:09,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77148830] [2022-01-31 21:06:09,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [77148830] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:06:09,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:06:09,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 21:06:09,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439185333] [2022-01-31 21:06:09,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:06:09,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 21:06:09,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:06:09,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 21:06:09,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3749, Invalid=4441, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 21:06:09,070 INFO L87 Difference]: Start difference. First operand 186 states and 187 transitions. Second operand has 91 states, 91 states have (on average 1.989010989010989) internal successors, (181), 89 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:23,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:06:23,655 INFO L93 Difference]: Finished difference Result 443 states and 527 transitions. [2022-01-31 21:06:23,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2022-01-31 21:06:23,655 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.989010989010989) internal successors, (181), 89 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2022-01-31 21:06:23,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:06:23,656 INFO L225 Difference]: With dead ends: 443 [2022-01-31 21:06:23,656 INFO L226 Difference]: Without dead ends: 437 [2022-01-31 21:06:23,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18522 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=22459, Invalid=46447, Unknown=0, NotChecked=0, Total=68906 [2022-01-31 21:06:23,659 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 779 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 1460 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1460 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:06:23,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [779 Valid, 50 Invalid, 1958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1460 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:06:23,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-01-31 21:06:23,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 188. [2022-01-31 21:06:23,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 183 states have (on average 1.010928961748634) internal successors, (185), 183 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:23,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 189 transitions. [2022-01-31 21:06:23,758 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 189 transitions. Word has length 185 [2022-01-31 21:06:23,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:06:23,758 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 189 transitions. [2022-01-31 21:06:23,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.989010989010989) internal successors, (181), 89 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:23,759 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 189 transitions. [2022-01-31 21:06:23,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-31 21:06:23,759 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:06:23,759 INFO L514 BasicCegarLoop]: trace histogram [85, 84, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:06:23,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 21:06:23,759 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:06:23,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:06:23,760 INFO L85 PathProgramCache]: Analyzing trace with hash -291423078, now seen corresponding path program 84 times [2022-01-31 21:06:23,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:06:23,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497898787] [2022-01-31 21:06:23,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:06:23,816 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:23,816 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:06:23,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:06:23,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:25,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:06:25,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:25,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:06:25,593 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:06:25,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497898787] [2022-01-31 21:06:25,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [497898787] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:06:25,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:06:25,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 21:06:25,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089210022] [2022-01-31 21:06:25,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:06:25,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 21:06:25,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:06:25,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 21:06:25,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3836, Invalid=4536, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 21:06:25,595 INFO L87 Difference]: Start difference. First operand 188 states and 189 transitions. Second operand has 92 states, 92 states have (on average 1.9891304347826086) internal successors, (183), 90 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:40,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:06:40,402 INFO L93 Difference]: Finished difference Result 448 states and 533 transitions. [2022-01-31 21:06:40,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2022-01-31 21:06:40,402 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.9891304347826086) internal successors, (183), 90 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2022-01-31 21:06:40,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:06:40,404 INFO L225 Difference]: With dead ends: 448 [2022-01-31 21:06:40,404 INFO L226 Difference]: Without dead ends: 442 [2022-01-31 21:06:40,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18955 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=22981, Invalid=47509, Unknown=0, NotChecked=0, Total=70490 [2022-01-31 21:06:40,406 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 739 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 1317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1317 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:06:40,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [739 Valid, 55 Invalid, 1823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1317 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:06:40,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-01-31 21:06:40,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 190. [2022-01-31 21:06:40,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.0108108108108107) internal successors, (187), 185 states have internal predecessors, (187), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:40,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2022-01-31 21:06:40,518 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 187 [2022-01-31 21:06:40,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:06:40,518 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2022-01-31 21:06:40,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.9891304347826086) internal successors, (183), 90 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:40,518 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2022-01-31 21:06:40,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-01-31 21:06:40,519 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:06:40,519 INFO L514 BasicCegarLoop]: trace histogram [86, 85, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:06:40,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 21:06:40,519 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:06:40,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:06:40,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1243199531, now seen corresponding path program 85 times [2022-01-31 21:06:40,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:06:40,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300792669] [2022-01-31 21:06:40,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:06:40,578 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:40,579 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:06:40,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:06:40,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:42,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:06:42,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:42,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:06:42,416 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:06:42,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300792669] [2022-01-31 21:06:42,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [300792669] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:06:42,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:06:42,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 21:06:42,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157049236] [2022-01-31 21:06:42,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:06:42,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 21:06:42,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:06:42,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 21:06:42,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3924, Invalid=4632, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 21:06:42,418 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand has 93 states, 93 states have (on average 1.989247311827957) internal successors, (185), 91 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:58,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:06:58,376 INFO L93 Difference]: Finished difference Result 453 states and 539 transitions. [2022-01-31 21:06:58,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2022-01-31 21:06:58,376 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.989247311827957) internal successors, (185), 91 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 189 [2022-01-31 21:06:58,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:06:58,377 INFO L225 Difference]: With dead ends: 453 [2022-01-31 21:06:58,377 INFO L226 Difference]: Without dead ends: 447 [2022-01-31 21:06:58,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19393 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=23509, Invalid=48583, Unknown=0, NotChecked=0, Total=72092 [2022-01-31 21:06:58,380 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 758 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 1458 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1458 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:06:58,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [758 Valid, 65 Invalid, 1989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1458 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:06:58,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-01-31 21:06:58,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 192. [2022-01-31 21:06:58,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.0106951871657754) internal successors, (189), 187 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:58,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2022-01-31 21:06:58,501 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 189 [2022-01-31 21:06:58,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:06:58,501 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2022-01-31 21:06:58,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.989247311827957) internal successors, (185), 91 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:58,501 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2022-01-31 21:06:58,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-01-31 21:06:58,502 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:06:58,502 INFO L514 BasicCegarLoop]: trace histogram [87, 86, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:06:58,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 21:06:58,502 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:06:58,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:06:58,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1072336816, now seen corresponding path program 86 times [2022-01-31 21:06:58,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:06:58,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092087225] [2022-01-31 21:06:58,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:06:58,554 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:58,555 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:06:58,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:06:58,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:00,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:07:00,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:00,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:07:00,221 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:07:00,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092087225] [2022-01-31 21:07:00,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2092087225] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:07:00,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:07:00,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 21:07:00,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637764975] [2022-01-31 21:07:00,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:07:00,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 21:07:00,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:07:00,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 21:07:00,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4013, Invalid=4729, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 21:07:00,224 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand has 94 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 92 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:16,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:07:16,350 INFO L93 Difference]: Finished difference Result 458 states and 545 transitions. [2022-01-31 21:07:16,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2022-01-31 21:07:16,351 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 92 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2022-01-31 21:07:16,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:07:16,352 INFO L225 Difference]: With dead ends: 458 [2022-01-31 21:07:16,352 INFO L226 Difference]: Without dead ends: 452 [2022-01-31 21:07:16,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19836 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=24043, Invalid=49669, Unknown=0, NotChecked=0, Total=73712 [2022-01-31 21:07:16,355 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 722 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 1380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1380 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:07:16,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [722 Valid, 75 Invalid, 1926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1380 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:07:16,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-01-31 21:07:16,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 194. [2022-01-31 21:07:16,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.0105820105820107) internal successors, (191), 189 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:16,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2022-01-31 21:07:16,486 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 191 [2022-01-31 21:07:16,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:07:16,486 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2022-01-31 21:07:16,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 92 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:16,486 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2022-01-31 21:07:16,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-01-31 21:07:16,487 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:07:16,487 INFO L514 BasicCegarLoop]: trace histogram [88, 87, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:07:16,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 21:07:16,487 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:07:16,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:07:16,487 INFO L85 PathProgramCache]: Analyzing trace with hash -82024949, now seen corresponding path program 87 times [2022-01-31 21:07:16,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:07:16,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960145940] [2022-01-31 21:07:16,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:07:16,523 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:16,523 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:07:16,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:07:16,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:18,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:07:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:18,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:07:18,923 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:07:18,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960145940] [2022-01-31 21:07:18,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [960145940] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:07:18,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:07:18,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 21:07:18,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403097243] [2022-01-31 21:07:18,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:07:18,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 21:07:18,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:07:18,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 21:07:18,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4103, Invalid=4827, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 21:07:18,926 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 93 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:35,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:07:35,658 INFO L93 Difference]: Finished difference Result 463 states and 551 transitions. [2022-01-31 21:07:35,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2022-01-31 21:07:35,658 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 93 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2022-01-31 21:07:35,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:07:35,659 INFO L225 Difference]: With dead ends: 463 [2022-01-31 21:07:35,659 INFO L226 Difference]: Without dead ends: 457 [2022-01-31 21:07:35,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20284 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=24583, Invalid=50767, Unknown=0, NotChecked=0, Total=75350 [2022-01-31 21:07:35,662 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 898 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 1553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 898 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 2059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1553 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:07:35,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [898 Valid, 40 Invalid, 2059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1553 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:07:35,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-01-31 21:07:35,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 196. [2022-01-31 21:07:35,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.0104712041884816) internal successors, (193), 191 states have internal predecessors, (193), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:35,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 197 transitions. [2022-01-31 21:07:35,787 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 197 transitions. Word has length 193 [2022-01-31 21:07:35,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:07:35,787 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 197 transitions. [2022-01-31 21:07:35,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 93 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:35,788 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 197 transitions. [2022-01-31 21:07:35,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-31 21:07:35,803 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:07:35,803 INFO L514 BasicCegarLoop]: trace histogram [89, 88, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:07:35,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 21:07:35,803 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:07:35,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:07:35,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1875060474, now seen corresponding path program 88 times [2022-01-31 21:07:35,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:07:35,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177500172] [2022-01-31 21:07:35,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:07:35,871 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:35,871 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:07:35,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:07:35,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:38,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:07:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:07:38,611 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:07:38,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177500172] [2022-01-31 21:07:38,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1177500172] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:07:38,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:07:38,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 21:07:38,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224299188] [2022-01-31 21:07:38,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:07:38,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 21:07:38,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:07:38,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 21:07:38,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4194, Invalid=4926, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 21:07:38,613 INFO L87 Difference]: Start difference. First operand 196 states and 197 transitions. Second operand has 96 states, 96 states have (on average 1.9895833333333333) internal successors, (191), 94 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:55,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:07:55,788 INFO L93 Difference]: Finished difference Result 468 states and 557 transitions. [2022-01-31 21:07:55,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2022-01-31 21:07:55,788 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.9895833333333333) internal successors, (191), 94 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2022-01-31 21:07:55,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:07:55,789 INFO L225 Difference]: With dead ends: 468 [2022-01-31 21:07:55,789 INFO L226 Difference]: Without dead ends: 462 [2022-01-31 21:07:55,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20737 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=25129, Invalid=51877, Unknown=0, NotChecked=0, Total=77006 [2022-01-31 21:07:55,792 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 785 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 1474 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1474 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:07:55,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [785 Valid, 50 Invalid, 1995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1474 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:07:55,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-01-31 21:07:55,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 198. [2022-01-31 21:07:55,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.0103626943005182) internal successors, (195), 193 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:55,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2022-01-31 21:07:55,924 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 195 [2022-01-31 21:07:55,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:07:55,924 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2022-01-31 21:07:55,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.9895833333333333) internal successors, (191), 94 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:55,924 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2022-01-31 21:07:55,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-01-31 21:07:55,925 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:07:55,925 INFO L514 BasicCegarLoop]: trace histogram [90, 89, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:07:55,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 21:07:55,925 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:07:55,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:07:55,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1594652993, now seen corresponding path program 89 times [2022-01-31 21:07:55,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:07:55,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276978650] [2022-01-31 21:07:55,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:07:55,981 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:55,981 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:07:55,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:07:56,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:57,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:07:57,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:57,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:07:57,846 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:07:57,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276978650] [2022-01-31 21:07:57,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1276978650] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:07:57,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:07:57,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 21:07:57,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270970421] [2022-01-31 21:07:57,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:07:57,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 21:07:57,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:07:57,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 21:07:57,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4286, Invalid=5026, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 21:07:57,849 INFO L87 Difference]: Start difference. First operand 198 states and 199 transitions. Second operand has 97 states, 97 states have (on average 1.9896907216494846) internal successors, (193), 95 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:15,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:08:15,386 INFO L93 Difference]: Finished difference Result 473 states and 563 transitions. [2022-01-31 21:08:15,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2022-01-31 21:08:15,407 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.9896907216494846) internal successors, (193), 95 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2022-01-31 21:08:15,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:08:15,409 INFO L225 Difference]: With dead ends: 473 [2022-01-31 21:08:15,409 INFO L226 Difference]: Without dead ends: 467 [2022-01-31 21:08:15,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21195 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=25681, Invalid=52999, Unknown=0, NotChecked=0, Total=78680 [2022-01-31 21:08:15,412 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 794 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 1332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1332 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:08:15,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [794 Valid, 65 Invalid, 1877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1332 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:08:15,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-01-31 21:08:15,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 200. [2022-01-31 21:08:15,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.0102564102564102) internal successors, (197), 195 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:15,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 201 transitions. [2022-01-31 21:08:15,542 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 201 transitions. Word has length 197 [2022-01-31 21:08:15,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:08:15,542 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 201 transitions. [2022-01-31 21:08:15,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.9896907216494846) internal successors, (193), 95 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:15,542 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 201 transitions. [2022-01-31 21:08:15,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-01-31 21:08:15,543 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:08:15,543 INFO L514 BasicCegarLoop]: trace histogram [91, 90, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:08:15,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 21:08:15,543 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:08:15,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:08:15,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1200294212, now seen corresponding path program 90 times [2022-01-31 21:08:15,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:08:15,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389012359] [2022-01-31 21:08:15,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:08:15,602 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:15,603 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:08:15,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:08:15,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:17,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:08:17,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:17,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:08:18,107 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:08:18,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389012359] [2022-01-31 21:08:18,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [389012359] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:08:18,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:08:18,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 21:08:18,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237073607] [2022-01-31 21:08:18,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:08:18,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 21:08:18,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:08:18,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 21:08:18,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4379, Invalid=5127, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 21:08:18,110 INFO L87 Difference]: Start difference. First operand 200 states and 201 transitions. Second operand has 98 states, 98 states have (on average 1.989795918367347) internal successors, (195), 96 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:36,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:08:36,183 INFO L93 Difference]: Finished difference Result 478 states and 569 transitions. [2022-01-31 21:08:36,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2022-01-31 21:08:36,183 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.989795918367347) internal successors, (195), 96 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2022-01-31 21:08:36,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:08:36,185 INFO L225 Difference]: With dead ends: 478 [2022-01-31 21:08:36,185 INFO L226 Difference]: Without dead ends: 472 [2022-01-31 21:08:36,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21658 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=26239, Invalid=54133, Unknown=0, NotChecked=0, Total=80372 [2022-01-31 21:08:36,187 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 758 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 1447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1447 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:08:36,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [758 Valid, 60 Invalid, 1990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1447 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:08:36,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-01-31 21:08:36,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 202. [2022-01-31 21:08:36,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.0101522842639594) internal successors, (199), 197 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:36,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2022-01-31 21:08:36,312 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 199 [2022-01-31 21:08:36,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:08:36,312 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2022-01-31 21:08:36,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.989795918367347) internal successors, (195), 96 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:36,312 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2022-01-31 21:08:36,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-31 21:08:36,313 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:08:36,313 INFO L514 BasicCegarLoop]: trace histogram [92, 91, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:08:36,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 21:08:36,313 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:08:36,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:08:36,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1504969079, now seen corresponding path program 91 times [2022-01-31 21:08:36,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:08:36,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440283909] [2022-01-31 21:08:36,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:08:36,364 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:36,364 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:08:36,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:08:36,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:38,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:08:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:38,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:08:38,862 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:08:38,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440283909] [2022-01-31 21:08:38,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [440283909] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:08:38,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:08:38,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 21:08:38,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409281793] [2022-01-31 21:08:38,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:08:38,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 21:08:38,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:08:38,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 21:08:38,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4473, Invalid=5229, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 21:08:38,865 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand has 99 states, 99 states have (on average 1.9898989898989898) internal successors, (197), 97 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:57,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:08:57,929 INFO L93 Difference]: Finished difference Result 483 states and 575 transitions. [2022-01-31 21:08:57,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2022-01-31 21:08:57,931 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.9898989898989898) internal successors, (197), 97 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 201 [2022-01-31 21:08:57,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:08:57,932 INFO L225 Difference]: With dead ends: 483 [2022-01-31 21:08:57,932 INFO L226 Difference]: Without dead ends: 477 [2022-01-31 21:08:57,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22126 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=26803, Invalid=55279, Unknown=0, NotChecked=0, Total=82082 [2022-01-31 21:08:57,935 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1084 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 1740 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1084 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1740 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:08:57,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1084 Valid, 45 Invalid, 2271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1740 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:08:57,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-01-31 21:08:58,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 204. [2022-01-31 21:08:58,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 199 states have (on average 1.0100502512562815) internal successors, (201), 199 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:58,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2022-01-31 21:08:58,059 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 201 [2022-01-31 21:08:58,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:08:58,059 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2022-01-31 21:08:58,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.9898989898989898) internal successors, (197), 97 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:58,059 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2022-01-31 21:08:58,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-31 21:08:58,060 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:08:58,060 INFO L514 BasicCegarLoop]: trace histogram [93, 92, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:08:58,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 21:08:58,060 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:08:58,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:08:58,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1487189646, now seen corresponding path program 92 times [2022-01-31 21:08:58,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:08:58,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234169438] [2022-01-31 21:08:58,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:08:58,119 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:58,120 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:08:58,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:08:58,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:00,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:09:00,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:00,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:09:00,128 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:09:00,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234169438] [2022-01-31 21:09:00,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [234169438] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:09:00,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:09:00,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 21:09:00,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27744004] [2022-01-31 21:09:00,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:09:00,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 21:09:00,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:09:00,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 21:09:00,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4568, Invalid=5332, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 21:09:00,131 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand has 100 states, 100 states have (on average 1.99) internal successors, (199), 98 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:09:20,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:09:20,072 INFO L93 Difference]: Finished difference Result 488 states and 581 transitions. [2022-01-31 21:09:20,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-01-31 21:09:20,073 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.99) internal successors, (199), 98 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-01-31 21:09:20,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:09:20,074 INFO L225 Difference]: With dead ends: 488 [2022-01-31 21:09:20,074 INFO L226 Difference]: Without dead ends: 482 [2022-01-31 21:09:20,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22599 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=27373, Invalid=56437, Unknown=0, NotChecked=0, Total=83810 [2022-01-31 21:09:20,077 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 775 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 1466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 2028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1466 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:09:20,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 65 Invalid, 2028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1466 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:09:20,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-01-31 21:09:20,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 206. [2022-01-31 21:09:20,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 201 states have (on average 1.0099502487562189) internal successors, (203), 201 states have internal predecessors, (203), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:09:20,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 207 transitions. [2022-01-31 21:09:20,219 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 207 transitions. Word has length 203 [2022-01-31 21:09:20,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:09:20,219 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 207 transitions. [2022-01-31 21:09:20,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.99) internal successors, (199), 98 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:09:20,219 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 207 transitions. [2022-01-31 21:09:20,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-01-31 21:09:20,220 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:09:20,220 INFO L514 BasicCegarLoop]: trace histogram [94, 93, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:09:20,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 21:09:20,220 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:09:20,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:09:20,220 INFO L85 PathProgramCache]: Analyzing trace with hash 676363949, now seen corresponding path program 93 times [2022-01-31 21:09:20,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:09:20,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659038404] [2022-01-31 21:09:20,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:09:20,275 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:20,276 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:09:20,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:09:20,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:22,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:09:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:22,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:09:22,665 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:09:22,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659038404] [2022-01-31 21:09:22,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1659038404] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:09:22,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:09:22,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 21:09:22,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115289742] [2022-01-31 21:09:22,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:09:22,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 21:09:22,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:09:22,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 21:09:22,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4664, Invalid=5436, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 21:09:22,669 INFO L87 Difference]: Start difference. First operand 206 states and 207 transitions. Second operand has 101 states, 101 states have (on average 1.99009900990099) internal successors, (201), 99 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:09:45,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:09:45,060 INFO L93 Difference]: Finished difference Result 493 states and 587 transitions. [2022-01-31 21:09:45,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2022-01-31 21:09:45,061 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.99009900990099) internal successors, (201), 99 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 205 [2022-01-31 21:09:45,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:09:45,062 INFO L225 Difference]: With dead ends: 493 [2022-01-31 21:09:45,062 INFO L226 Difference]: Without dead ends: 487 [2022-01-31 21:09:45,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23077 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=27949, Invalid=57607, Unknown=0, NotChecked=0, Total=85556 [2022-01-31 21:09:45,065 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 835 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 1515 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 2077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1515 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:09:45,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [835 Valid, 60 Invalid, 2077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1515 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 21:09:45,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-01-31 21:09:45,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 208. [2022-01-31 21:09:45,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.0098522167487685) internal successors, (205), 203 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:09:45,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 209 transitions. [2022-01-31 21:09:45,198 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 209 transitions. Word has length 205 [2022-01-31 21:09:45,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:09:45,198 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 209 transitions. [2022-01-31 21:09:45,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.99009900990099) internal successors, (201), 99 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:09:45,198 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 209 transitions. [2022-01-31 21:09:45,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-01-31 21:09:45,199 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:09:45,199 INFO L514 BasicCegarLoop]: trace histogram [95, 94, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:09:45,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 21:09:45,199 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:09:45,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:09:45,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1087197480, now seen corresponding path program 94 times [2022-01-31 21:09:45,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:09:45,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650262739] [2022-01-31 21:09:45,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:09:45,245 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:45,245 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:09:45,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:09:45,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:47,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:09:47,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:47,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:09:47,540 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:09:47,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650262739] [2022-01-31 21:09:47,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1650262739] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:09:47,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:09:47,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 21:09:47,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642678997] [2022-01-31 21:09:47,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:09:47,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 21:09:47,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:09:47,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 21:09:47,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4761, Invalid=5541, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 21:09:47,543 INFO L87 Difference]: Start difference. First operand 208 states and 209 transitions. Second operand has 102 states, 102 states have (on average 1.9901960784313726) internal successors, (203), 100 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:10:07,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:10:07,910 INFO L93 Difference]: Finished difference Result 498 states and 593 transitions. [2022-01-31 21:10:07,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2022-01-31 21:10:07,910 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.9901960784313726) internal successors, (203), 100 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 207 [2022-01-31 21:10:07,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:10:07,911 INFO L225 Difference]: With dead ends: 498 [2022-01-31 21:10:07,911 INFO L226 Difference]: Without dead ends: 492 [2022-01-31 21:10:07,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 294 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23560 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=28531, Invalid=58789, Unknown=0, NotChecked=0, Total=87320 [2022-01-31 21:10:07,914 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 894 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 1638 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 2217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1638 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:10:07,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [894 Valid, 70 Invalid, 2217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1638 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:10:07,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-01-31 21:10:08,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 210. [2022-01-31 21:10:08,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.0097560975609756) internal successors, (207), 205 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:10:08,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 211 transitions. [2022-01-31 21:10:08,045 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 211 transitions. Word has length 207 [2022-01-31 21:10:08,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:10:08,046 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 211 transitions. [2022-01-31 21:10:08,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.9901960784313726) internal successors, (203), 100 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:10:08,046 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 211 transitions. [2022-01-31 21:10:08,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-01-31 21:10:08,046 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:10:08,046 INFO L514 BasicCegarLoop]: trace histogram [96, 95, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:10:08,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 21:10:08,047 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:10:08,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:10:08,047 INFO L85 PathProgramCache]: Analyzing trace with hash 761229539, now seen corresponding path program 95 times [2022-01-31 21:10:08,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:10:08,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51545360] [2022-01-31 21:10:08,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:10:08,119 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:08,119 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:10:08,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:10:08,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:09,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:10:09,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:09,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:10:10,061 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:10:10,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51545360] [2022-01-31 21:10:10,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [51545360] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:10:10,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:10:10,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 21:10:10,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121036047] [2022-01-31 21:10:10,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:10:10,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 21:10:10,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:10:10,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 21:10:10,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4859, Invalid=5647, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 21:10:10,066 INFO L87 Difference]: Start difference. First operand 210 states and 211 transitions. Second operand has 103 states, 103 states have (on average 1.9902912621359223) internal successors, (205), 101 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:10:31,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:10:31,194 INFO L93 Difference]: Finished difference Result 503 states and 599 transitions. [2022-01-31 21:10:31,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2022-01-31 21:10:31,195 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.9902912621359223) internal successors, (205), 101 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 209 [2022-01-31 21:10:31,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:10:31,196 INFO L225 Difference]: With dead ends: 503 [2022-01-31 21:10:31,196 INFO L226 Difference]: Without dead ends: 497 [2022-01-31 21:10:31,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24048 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=29119, Invalid=59983, Unknown=0, NotChecked=0, Total=89102 [2022-01-31 21:10:31,199 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 789 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 1369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1369 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:10:31,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [789 Valid, 75 Invalid, 1958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1369 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:10:31,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-01-31 21:10:31,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 212. [2022-01-31 21:10:31,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.0096618357487923) internal successors, (209), 207 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:10:31,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 213 transitions. [2022-01-31 21:10:31,346 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 213 transitions. Word has length 209 [2022-01-31 21:10:31,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:10:31,346 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 213 transitions. [2022-01-31 21:10:31,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.9902912621359223) internal successors, (205), 101 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:10:31,346 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 213 transitions. [2022-01-31 21:10:31,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-01-31 21:10:31,347 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:10:31,347 INFO L514 BasicCegarLoop]: trace histogram [97, 96, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:10:31,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 21:10:31,347 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:10:31,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:10:31,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1038650846, now seen corresponding path program 96 times [2022-01-31 21:10:31,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:10:31,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714859907] [2022-01-31 21:10:31,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:10:31,389 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:31,389 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:10:31,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:10:31,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:33,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:10:33,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:33,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:10:33,741 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:10:33,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714859907] [2022-01-31 21:10:33,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1714859907] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:10:33,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:10:33,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 21:10:33,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379969717] [2022-01-31 21:10:33,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:10:33,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 21:10:33,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:10:33,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 21:10:33,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4958, Invalid=5754, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 21:10:33,744 INFO L87 Difference]: Start difference. First operand 212 states and 213 transitions. Second operand has 104 states, 104 states have (on average 1.9903846153846154) internal successors, (207), 102 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:10:55,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:10:55,388 INFO L93 Difference]: Finished difference Result 508 states and 605 transitions. [2022-01-31 21:10:55,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2022-01-31 21:10:55,388 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.9903846153846154) internal successors, (207), 102 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 211 [2022-01-31 21:10:55,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:10:55,390 INFO L225 Difference]: With dead ends: 508 [2022-01-31 21:10:55,390 INFO L226 Difference]: Without dead ends: 502 [2022-01-31 21:10:55,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24541 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=29713, Invalid=61189, Unknown=0, NotChecked=0, Total=90902 [2022-01-31 21:10:55,393 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 844 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 1489 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1489 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:10:55,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [844 Valid, 50 Invalid, 2054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1489 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:10:55,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-01-31 21:10:55,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 214. [2022-01-31 21:10:55,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.0095693779904307) internal successors, (211), 209 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:10:55,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2022-01-31 21:10:55,528 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 211 [2022-01-31 21:10:55,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:10:55,528 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2022-01-31 21:10:55,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.9903846153846154) internal successors, (207), 102 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:10:55,528 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2022-01-31 21:10:55,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-01-31 21:10:55,530 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:10:55,531 INFO L514 BasicCegarLoop]: trace histogram [98, 97, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:10:55,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 21:10:55,531 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:10:55,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:10:55,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1352554521, now seen corresponding path program 97 times [2022-01-31 21:10:55,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:10:55,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150877466] [2022-01-31 21:10:55,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:10:55,594 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:55,594 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:10:55,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:10:55,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:57,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:10:57,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:57,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:10:57,964 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:10:57,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150877466] [2022-01-31 21:10:57,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [150877466] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:10:57,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:10:57,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 21:10:57,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197352935] [2022-01-31 21:10:57,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:10:57,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 21:10:57,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:10:57,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 21:10:57,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5058, Invalid=5862, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 21:10:57,967 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand has 105 states, 105 states have (on average 1.9904761904761905) internal successors, (209), 103 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:11:20,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:11:20,134 INFO L93 Difference]: Finished difference Result 513 states and 611 transitions. [2022-01-31 21:11:20,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2022-01-31 21:11:20,134 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.9904761904761905) internal successors, (209), 103 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 213 [2022-01-31 21:11:20,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:11:20,138 INFO L225 Difference]: With dead ends: 513 [2022-01-31 21:11:20,138 INFO L226 Difference]: Without dead ends: 507 [2022-01-31 21:11:20,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 303 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25039 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=30313, Invalid=62407, Unknown=0, NotChecked=0, Total=92720 [2022-01-31 21:11:20,141 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1221 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 1824 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1221 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 2382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1824 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:11:20,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1221 Valid, 40 Invalid, 2382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1824 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:11:20,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-01-31 21:11:20,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 216. [2022-01-31 21:11:20,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.009478672985782) internal successors, (213), 211 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:11:20,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 217 transitions. [2022-01-31 21:11:20,280 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 217 transitions. Word has length 213 [2022-01-31 21:11:20,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:11:20,280 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 217 transitions. [2022-01-31 21:11:20,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.9904761904761905) internal successors, (209), 103 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:11:20,280 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 217 transitions. [2022-01-31 21:11:20,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-01-31 21:11:20,281 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:11:20,281 INFO L514 BasicCegarLoop]: trace histogram [99, 98, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:11:20,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 21:11:20,281 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:11:20,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:11:20,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1928691820, now seen corresponding path program 98 times [2022-01-31 21:11:20,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:11:20,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116497768] [2022-01-31 21:11:20,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:11:20,338 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:20,338 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:11:20,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:11:20,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:22,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:11:22,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:22,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:11:22,700 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:11:22,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116497768] [2022-01-31 21:11:22,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [116497768] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:11:22,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:11:22,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 21:11:22,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592219034] [2022-01-31 21:11:22,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:11:22,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 21:11:22,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:11:22,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 21:11:22,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5159, Invalid=5971, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 21:11:22,702 INFO L87 Difference]: Start difference. First operand 216 states and 217 transitions. Second operand has 106 states, 106 states have (on average 1.990566037735849) internal successors, (211), 104 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:11:46,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:11:46,069 INFO L93 Difference]: Finished difference Result 518 states and 617 transitions. [2022-01-31 21:11:46,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2022-01-31 21:11:46,069 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.990566037735849) internal successors, (211), 104 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 215 [2022-01-31 21:11:46,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:11:46,071 INFO L225 Difference]: With dead ends: 518 [2022-01-31 21:11:46,071 INFO L226 Difference]: Without dead ends: 512 [2022-01-31 21:11:46,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 306 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25542 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=30919, Invalid=63637, Unknown=0, NotChecked=0, Total=94556 [2022-01-31 21:11:46,074 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 936 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 1616 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 2206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1616 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:11:46,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [936 Valid, 65 Invalid, 2206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1616 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:11:46,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-01-31 21:11:46,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 218. [2022-01-31 21:11:46,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 213 states have (on average 1.0093896713615023) internal successors, (215), 213 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:11:46,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 219 transitions. [2022-01-31 21:11:46,218 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 219 transitions. Word has length 215 [2022-01-31 21:11:46,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:11:46,218 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 219 transitions. [2022-01-31 21:11:46,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.990566037735849) internal successors, (211), 104 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:11:46,218 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 219 transitions. [2022-01-31 21:11:46,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-01-31 21:11:46,220 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:11:46,220 INFO L514 BasicCegarLoop]: trace histogram [100, 99, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:11:46,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 21:11:46,220 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:11:46,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:11:46,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1594537039, now seen corresponding path program 99 times [2022-01-31 21:11:46,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:11:46,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254235656] [2022-01-31 21:11:46,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:11:46,273 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:46,273 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:11:46,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:11:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:49,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:11:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:49,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:11:49,601 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:11:49,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254235656] [2022-01-31 21:11:49,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1254235656] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:11:49,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:11:49,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 21:11:49,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039870054] [2022-01-31 21:11:49,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:11:49,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 21:11:49,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:11:49,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 21:11:49,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5261, Invalid=6081, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 21:11:49,604 INFO L87 Difference]: Start difference. First operand 218 states and 219 transitions. Second operand has 107 states, 107 states have (on average 1.9906542056074767) internal successors, (213), 105 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:12:13,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:12:13,283 INFO L93 Difference]: Finished difference Result 523 states and 623 transitions. [2022-01-31 21:12:13,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 207 states. [2022-01-31 21:12:13,283 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.9906542056074767) internal successors, (213), 105 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 217 [2022-01-31 21:12:13,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:12:13,306 INFO L225 Difference]: With dead ends: 523 [2022-01-31 21:12:13,306 INFO L226 Difference]: Without dead ends: 517 [2022-01-31 21:12:13,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26050 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=31531, Invalid=64879, Unknown=0, NotChecked=0, Total=96410 [2022-01-31 21:12:13,309 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 837 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 1592 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 2187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1592 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:12:13,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [837 Valid, 55 Invalid, 2187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1592 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:12:13,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-01-31 21:12:13,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 220. [2022-01-31 21:12:13,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.0093023255813953) internal successors, (217), 215 states have internal predecessors, (217), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:12:13,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 221 transitions. [2022-01-31 21:12:13,469 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 221 transitions. Word has length 217 [2022-01-31 21:12:13,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:12:13,469 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 221 transitions. [2022-01-31 21:12:13,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.9906542056074767) internal successors, (213), 105 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:12:13,469 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 221 transitions. [2022-01-31 21:12:13,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-01-31 21:12:13,470 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:12:13,470 INFO L514 BasicCegarLoop]: trace histogram [101, 100, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:12:13,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 21:12:13,470 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:12:13,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:12:13,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1311726006, now seen corresponding path program 100 times [2022-01-31 21:12:13,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:12:13,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077440995] [2022-01-31 21:12:13,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:12:13,546 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:13,546 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:12:13,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:12:13,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:12:16,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:12:16,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:12:16,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:12:16,992 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:12:16,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077440995] [2022-01-31 21:12:16,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1077440995] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:12:16,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:12:16,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 21:12:16,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732389107] [2022-01-31 21:12:16,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:12:16,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 21:12:16,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:12:16,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 21:12:16,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5364, Invalid=6192, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 21:12:16,995 INFO L87 Difference]: Start difference. First operand 220 states and 221 transitions. Second operand has 108 states, 108 states have (on average 1.9907407407407407) internal successors, (215), 106 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:12:40,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:12:40,979 INFO L93 Difference]: Finished difference Result 528 states and 629 transitions. [2022-01-31 21:12:40,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 209 states. [2022-01-31 21:12:40,980 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.9907407407407407) internal successors, (215), 106 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 219 [2022-01-31 21:12:40,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:12:40,981 INFO L225 Difference]: With dead ends: 528 [2022-01-31 21:12:40,981 INFO L226 Difference]: Without dead ends: 522 [2022-01-31 21:12:40,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26563 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=32149, Invalid=66133, Unknown=0, NotChecked=0, Total=98282 [2022-01-31 21:12:40,984 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 843 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 1712 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 2309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1712 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:12:40,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [843 Valid, 60 Invalid, 2309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1712 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:12:40,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-01-31 21:12:41,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 222. [2022-01-31 21:12:41,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 217 states have (on average 1.0092165898617511) internal successors, (219), 217 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:12:41,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 223 transitions. [2022-01-31 21:12:41,139 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 223 transitions. Word has length 219 [2022-01-31 21:12:41,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:12:41,139 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 223 transitions. [2022-01-31 21:12:41,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.9907407407407407) internal successors, (215), 106 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:12:41,139 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 223 transitions. [2022-01-31 21:12:41,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-01-31 21:12:41,139 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:12:41,140 INFO L514 BasicCegarLoop]: trace histogram [102, 101, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:12:41,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 21:12:41,140 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:12:41,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:12:41,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1793197445, now seen corresponding path program 101 times [2022-01-31 21:12:41,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:12:41,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752893460] [2022-01-31 21:12:41,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:12:41,243 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:41,243 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:12:41,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:12:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:12:43,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:12:43,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:12:43,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:12:43,615 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:12:43,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752893460] [2022-01-31 21:12:43,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1752893460] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:12:43,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:12:43,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 21:12:43,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707547378] [2022-01-31 21:12:43,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:12:43,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 21:12:43,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:12:43,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 21:12:43,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5261, Invalid=6081, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 21:12:43,621 INFO L87 Difference]: Start difference. First operand 222 states and 223 transitions. Second operand has 107 states, 107 states have (on average 2.02803738317757) internal successors, (217), 106 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:12:46,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:12:46,518 INFO L93 Difference]: Finished difference Result 222 states and 223 transitions. [2022-01-31 21:12:46,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 21:12:46,518 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.02803738317757) internal successors, (217), 106 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 221 [2022-01-31 21:12:46,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:12:46,518 INFO L225 Difference]: With dead ends: 222 [2022-01-31 21:12:46,518 INFO L226 Difference]: Without dead ends: 0 [2022-01-31 21:12:46,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5753 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=15983, Invalid=28327, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 21:12:46,520 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 17 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 1404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:12:46,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 162 Invalid, 1404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1394 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:12:46,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-31 21:12:46,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-31 21:12:46,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-31 21:12:46,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-31 21:12:46,521 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 221 [2022-01-31 21:12:46,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:12:46,521 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-31 21:12:46,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.02803738317757) internal successors, (217), 106 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:12:46,521 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-31 21:12:46,521 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-31 21:12:46,528 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 21:12:46,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 21:12:46,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.